./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.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_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/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_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/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_f35ada71-5079-4666-b85c-99afe60aeb1f/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 8c753c2343d61d5c6f96a078c56a1e34de0907f4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:18:59,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:18:59,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:18:59,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:18:59,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:18:59,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:18:59,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:18:59,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:18:59,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:18:59,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:18:59,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:18:59,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:18:59,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:18:59,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:18:59,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:18:59,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:18:59,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:18:59,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:18:59,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:18:59,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:18:59,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:18:59,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:18:59,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:18:59,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:18:59,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:18:59,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:18:59,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:18:59,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:18:59,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:18:59,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:18:59,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:18:59,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:18:59,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:18:59,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:18:59,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:18:59,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:18:59,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:18:59,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:18:59,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:19:00,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:19:00,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:19:00,002 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:19:00,054 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:19:00,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:19:00,055 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:19:00,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:19:00,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:19:00,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:19:00,058 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:19:00,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:19:00,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:19:00,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:19:00,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:19:00,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:19:00,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:19:00,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:19:00,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:19:00,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:19:00,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:19:00,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:19:00,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:19:00,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:19:00,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:19:00,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:19:00,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:19:00,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:19:00,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:19:00,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:19:00,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:19:00,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:19:00,064 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:19:00,065 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:19:00,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:19:00,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:19:00,066 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_f35ada71-5079-4666-b85c-99afe60aeb1f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c753c2343d61d5c6f96a078c56a1e34de0907f4 [2021-10-15 20:19:00,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:19:00,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:19:00,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:19:00,387 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:19:00,388 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:19:00,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c [2021-10-15 20:19:00,495 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/data/b8cacb0e0/3476a1fc693749afa31616f22859a71b/FLAG87023b78e [2021-10-15 20:19:01,089 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:19:01,092 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c [2021-10-15 20:19:01,104 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/data/b8cacb0e0/3476a1fc693749afa31616f22859a71b/FLAG87023b78e [2021-10-15 20:19:01,431 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/data/b8cacb0e0/3476a1fc693749afa31616f22859a71b [2021-10-15 20:19:01,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:19:01,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:19:01,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:19:01,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:19:01,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:19:01,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16e7b217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01, skipping insertion in model container [2021-10-15 20:19:01,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:19:01,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:19:01,706 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_f35ada71-5079-4666-b85c-99afe60aeb1f/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c[526,539] [2021-10-15 20:19:01,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:19:01,733 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:19:01,747 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_f35ada71-5079-4666-b85c-99afe60aeb1f/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c[526,539] [2021-10-15 20:19:01,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:19:01,770 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:19:01,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01 WrapperNode [2021-10-15 20:19:01,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:19:01,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:19:01,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:19:01,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:19:01,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:19:01,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:19:01,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:19:01,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:19:01,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:19:01,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:19:01,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:19:01,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:19:01,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01" (1/1) ... [2021-10-15 20:19:01,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:19:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:01,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:19:01,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:19:01,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:19:01,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:19:01,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:19:01,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:19:02,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:19:02,349 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-15 20:19:02,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:19:02 BoogieIcfgContainer [2021-10-15 20:19:02,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:19:02,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:19:02,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:19:02,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:19:02,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:19:01" (1/3) ... [2021-10-15 20:19:02,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3604e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:19:02, skipping insertion in model container [2021-10-15 20:19:02,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:01" (2/3) ... [2021-10-15 20:19:02,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3604e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:19:02, skipping insertion in model container [2021-10-15 20:19:02,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:19:02" (3/3) ... [2021-10-15 20:19:02,363 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound100.c [2021-10-15 20:19:02,369 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:19:02,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-15 20:19:02,445 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:19:02,453 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 20:19:02,454 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-15 20:19:02,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 39 places, 53 transitions, 106 flow [2021-10-15 20:19:02,509 INFO L129 PetriNetUnfolder]: 15/53 cut-off events. [2021-10-15 20:19:02,510 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:19:02,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 53 events. 15/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 133 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 20:19:02,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 53 transitions, 106 flow [2021-10-15 20:19:02,518 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 48 transitions, 96 flow [2021-10-15 20:19:02,524 INFO L129 PetriNetUnfolder]: 5/19 cut-off events. [2021-10-15 20:19:02,524 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:19:02,525 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:02,525 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:02,526 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-10-15 20:19:02,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:02,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593799440] [2021-10-15 20:19:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:02,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:02,730 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 20:19:02,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:02,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593799440] [2021-10-15 20:19:02,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593799440] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:02,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:02,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:19:02,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217438401] [2021-10-15 20:19:02,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:19:02,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:19:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:19:02,768 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 53 [2021-10-15 20:19:02,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 48 transitions, 96 flow. Second operand has 2 states, 2 states have (on average 41.5) internal successors, (83), 2 states have internal predecessors, (83), 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 20:19:02,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:02,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 53 [2021-10-15 20:19:02,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:02,809 INFO L129 PetriNetUnfolder]: 3/37 cut-off events. [2021-10-15 20:19:02,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:19:02,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 37 events. 3/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 9/37 useless extension candidates. Maximal degree in co-relation 37. Up to 3 conditions per place. [2021-10-15 20:19:02,812 INFO L132 encePairwiseOnDemand]: 42/53 looper letters, 0 selfloop transitions, 0 changer transitions 0/37 dead transitions. [2021-10-15 20:19:02,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 74 flow [2021-10-15 20:19:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:19:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:19:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 93 transitions. [2021-10-15 20:19:02,828 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8773584905660378 [2021-10-15 20:19:02,829 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 93 transitions. [2021-10-15 20:19:02,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 93 transitions. [2021-10-15 20:19:02,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:02,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 93 transitions. [2021-10-15 20:19:02,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 46.5) internal successors, (93), 2 states have internal predecessors, (93), 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 20:19:02,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 20:19:02,863 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 20:19:02,866 INFO L186 Difference]: Start difference. First operand has 35 places, 48 transitions, 96 flow. Second operand 2 states and 93 transitions. [2021-10-15 20:19:02,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 74 flow [2021-10-15 20:19:02,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:19:02,873 INFO L242 Difference]: Finished difference. Result has 36 places, 37 transitions, 74 flow [2021-10-15 20:19:02,876 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=74, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2021-10-15 20:19:02,877 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2021-10-15 20:19:02,878 INFO L470 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 74 flow [2021-10-15 20:19:02,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 41.5) internal successors, (83), 2 states have internal predecessors, (83), 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 20:19:02,879 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:02,879 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:02,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:19:02,880 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-10-15 20:19:02,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:02,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550068006] [2021-10-15 20:19:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:02,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:03,006 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 20:19:03,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:03,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550068006] [2021-10-15 20:19:03,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550068006] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:03,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:03,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:19:03,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781538626] [2021-10-15 20:19:03,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:19:03,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:19:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:19:03,013 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2021-10-15 20:19:03,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 20:19:03,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:03,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2021-10-15 20:19:03,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:03,143 INFO L129 PetriNetUnfolder]: 4/55 cut-off events. [2021-10-15 20:19:03,146 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:19:03,146 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 55 events. 4/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 90. Up to 13 conditions per place. [2021-10-15 20:19:03,148 INFO L132 encePairwiseOnDemand]: 38/53 looper letters, 14 selfloop transitions, 21 changer transitions 0/48 dead transitions. [2021-10-15 20:19:03,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 48 transitions, 166 flow [2021-10-15 20:19:03,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:19:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:19:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2021-10-15 20:19:03,154 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45660377358490567 [2021-10-15 20:19:03,155 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 121 transitions. [2021-10-15 20:19:03,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 121 transitions. [2021-10-15 20:19:03,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:03,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 121 transitions. [2021-10-15 20:19:03,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 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 20:19:03,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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 20:19:03,162 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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 20:19:03,162 INFO L186 Difference]: Start difference. First operand has 36 places, 37 transitions, 74 flow. Second operand 5 states and 121 transitions. [2021-10-15 20:19:03,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 48 transitions, 166 flow [2021-10-15 20:19:03,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:19:03,168 INFO L242 Difference]: Finished difference. Result has 40 places, 44 transitions, 160 flow [2021-10-15 20:19:03,168 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=40, PETRI_TRANSITIONS=44} [2021-10-15 20:19:03,169 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2021-10-15 20:19:03,170 INFO L470 AbstractCegarLoop]: Abstraction has has 40 places, 44 transitions, 160 flow [2021-10-15 20:19:03,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 20:19:03,171 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:03,171 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:03,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:19:03,172 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:03,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1186787538, now seen corresponding path program 1 times [2021-10-15 20:19:03,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:03,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619312398] [2021-10-15 20:19:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:03,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:03,258 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 20:19:03,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:03,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619312398] [2021-10-15 20:19:03,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619312398] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:03,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:03,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:19:03,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428625590] [2021-10-15 20:19:03,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:19:03,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:03,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:19:03,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:19:03,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2021-10-15 20:19:03,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 44 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 20:19:03,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:03,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2021-10-15 20:19:03,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:03,349 INFO L129 PetriNetUnfolder]: 4/53 cut-off events. [2021-10-15 20:19:03,349 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 20:19:03,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 53 events. 4/53 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 1/51 useless extension candidates. Maximal degree in co-relation 127. Up to 13 conditions per place. [2021-10-15 20:19:03,351 INFO L132 encePairwiseOnDemand]: 39/53 looper letters, 18 selfloop transitions, 20 changer transitions 0/47 dead transitions. [2021-10-15 20:19:03,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 242 flow [2021-10-15 20:19:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:19:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:19:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2021-10-15 20:19:03,355 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41132075471698115 [2021-10-15 20:19:03,355 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 109 transitions. [2021-10-15 20:19:03,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 109 transitions. [2021-10-15 20:19:03,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:03,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 109 transitions. [2021-10-15 20:19:03,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:03,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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 20:19:03,360 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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 20:19:03,361 INFO L186 Difference]: Start difference. First operand has 40 places, 44 transitions, 160 flow. Second operand 5 states and 109 transitions. [2021-10-15 20:19:03,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 242 flow [2021-10-15 20:19:03,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 242 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:19:03,367 INFO L242 Difference]: Finished difference. Result has 42 places, 42 transitions, 196 flow [2021-10-15 20:19:03,368 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2021-10-15 20:19:03,368 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2021-10-15 20:19:03,368 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 196 flow [2021-10-15 20:19:03,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 20:19:03,369 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:03,369 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:03,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:19:03,370 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:03,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1958320619, now seen corresponding path program 1 times [2021-10-15 20:19:03,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:03,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443402626] [2021-10-15 20:19:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:03,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:03,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:03,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4808541] [2021-10-15 20:19:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:03,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:03,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:03,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:03,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:19:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:03,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:19:03,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:03,710 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 20:19:03,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:03,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443402626] [2021-10-15 20:19:03,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:03,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4808541] [2021-10-15 20:19:03,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4808541] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:03,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:03,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:19:03,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955857428] [2021-10-15 20:19:03,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:19:03,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:03,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:19:03,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:19:03,716 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2021-10-15 20:19:03,716 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 20:19:03,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:03,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2021-10-15 20:19:03,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:03,840 INFO L129 PetriNetUnfolder]: 4/73 cut-off events. [2021-10-15 20:19:03,842 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-10-15 20:19:03,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 73 events. 4/73 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 103 event pairs, 0 based on Foata normal form. 3/72 useless extension candidates. Maximal degree in co-relation 223. Up to 42 conditions per place. [2021-10-15 20:19:03,844 INFO L132 encePairwiseOnDemand]: 41/53 looper letters, 44 selfloop transitions, 7 changer transitions 2/60 dead transitions. [2021-10-15 20:19:03,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 406 flow [2021-10-15 20:19:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:19:03,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:19:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2021-10-15 20:19:03,851 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41132075471698115 [2021-10-15 20:19:03,853 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 109 transitions. [2021-10-15 20:19:03,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 109 transitions. [2021-10-15 20:19:03,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:03,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 109 transitions. [2021-10-15 20:19:03,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:03,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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 20:19:03,860 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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 20:19:03,860 INFO L186 Difference]: Start difference. First operand has 42 places, 42 transitions, 196 flow. Second operand 5 states and 109 transitions. [2021-10-15 20:19:03,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 406 flow [2021-10-15 20:19:03,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:19:03,872 INFO L242 Difference]: Finished difference. Result has 47 places, 48 transitions, 268 flow [2021-10-15 20:19:03,873 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2021-10-15 20:19:03,873 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 12 predicate places. [2021-10-15 20:19:03,873 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 268 flow [2021-10-15 20:19:03,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 20:19:03,874 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:03,875 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:03,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:04,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:04,091 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:04,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:04,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1783857492, now seen corresponding path program 1 times [2021-10-15 20:19:04,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:04,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378860420] [2021-10-15 20:19:04,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:04,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:04,112 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:04,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867683220] [2021-10-15 20:19:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:04,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:04,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:04,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:04,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:19:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:04,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:19:04,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:04,446 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 20:19:04,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:04,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378860420] [2021-10-15 20:19:04,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:04,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867683220] [2021-10-15 20:19:04,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867683220] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:04,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:04,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:19:04,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131619051] [2021-10-15 20:19:04,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:19:04,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:04,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:19:04,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:19:04,451 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2021-10-15 20:19:04,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:04,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:04,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2021-10-15 20:19:04,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:04,567 INFO L129 PetriNetUnfolder]: 4/64 cut-off events. [2021-10-15 20:19:04,567 INFO L130 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2021-10-15 20:19:04,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 64 events. 4/64 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 4/68 useless extension candidates. Maximal degree in co-relation 220. Up to 18 conditions per place. [2021-10-15 20:19:04,570 INFO L132 encePairwiseOnDemand]: 43/53 looper letters, 28 selfloop transitions, 11 changer transitions 3/51 dead transitions. [2021-10-15 20:19:04,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 362 flow [2021-10-15 20:19:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:19:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:19:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2021-10-15 20:19:04,573 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4386792452830189 [2021-10-15 20:19:04,573 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 93 transitions. [2021-10-15 20:19:04,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 93 transitions. [2021-10-15 20:19:04,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:04,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 93 transitions. [2021-10-15 20:19:04,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 20:19:04,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 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 20:19:04,578 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 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 20:19:04,579 INFO L186 Difference]: Start difference. First operand has 47 places, 48 transitions, 268 flow. Second operand 4 states and 93 transitions. [2021-10-15 20:19:04,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 362 flow [2021-10-15 20:19:04,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 354 flow, removed 3 selfloop flow, removed 1 redundant places. [2021-10-15 20:19:04,593 INFO L242 Difference]: Finished difference. Result has 50 places, 45 transitions, 261 flow [2021-10-15 20:19:04,594 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2021-10-15 20:19:04,594 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 15 predicate places. [2021-10-15 20:19:04,594 INFO L470 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 261 flow [2021-10-15 20:19:04,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:04,595 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:04,596 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:04,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:04,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:04,809 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:04,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:04,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1907209632, now seen corresponding path program 1 times [2021-10-15 20:19:04,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:04,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722503889] [2021-10-15 20:19:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:04,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:04,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:04,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285222546] [2021-10-15 20:19:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:04,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:04,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:04,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:04,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:19:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:04,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:19:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:05,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:05,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722503889] [2021-10-15 20:19:05,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:05,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285222546] [2021-10-15 20:19:05,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285222546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:19:05,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:19:05,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 20:19:05,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500588457] [2021-10-15 20:19:05,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:19:05,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:05,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:19:05,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:19:05,140 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2021-10-15 20:19:05,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:05,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:05,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2021-10-15 20:19:05,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:05,292 INFO L129 PetriNetUnfolder]: 4/92 cut-off events. [2021-10-15 20:19:05,292 INFO L130 PetriNetUnfolder]: For 136/136 co-relation queries the response was YES. [2021-10-15 20:19:05,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 92 events. 4/92 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 0 based on Foata normal form. 9/101 useless extension candidates. Maximal degree in co-relation 348. Up to 40 conditions per place. [2021-10-15 20:19:05,294 INFO L132 encePairwiseOnDemand]: 40/53 looper letters, 51 selfloop transitions, 13 changer transitions 11/82 dead transitions. [2021-10-15 20:19:05,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 82 transitions, 661 flow [2021-10-15 20:19:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:19:05,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:19:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2021-10-15 20:19:05,296 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40431266846361186 [2021-10-15 20:19:05,297 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 150 transitions. [2021-10-15 20:19:05,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 150 transitions. [2021-10-15 20:19:05,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:05,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 150 transitions. [2021-10-15 20:19:05,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 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 20:19:05,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 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 20:19:05,300 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 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 20:19:05,301 INFO L186 Difference]: Start difference. First operand has 50 places, 45 transitions, 261 flow. Second operand 7 states and 150 transitions. [2021-10-15 20:19:05,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 82 transitions, 661 flow [2021-10-15 20:19:05,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 638 flow, removed 10 selfloop flow, removed 1 redundant places. [2021-10-15 20:19:05,308 INFO L242 Difference]: Finished difference. Result has 60 places, 54 transitions, 405 flow [2021-10-15 20:19:05,308 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=405, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2021-10-15 20:19:05,309 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 25 predicate places. [2021-10-15 20:19:05,309 INFO L470 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 405 flow [2021-10-15 20:19:05,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:05,309 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:05,309 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:05,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:05,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-15 20:19:05,534 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:05,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:05,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1115495499, now seen corresponding path program 2 times [2021-10-15 20:19:05,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:05,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708960836] [2021-10-15 20:19:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:05,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:05,562 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:05,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701169410] [2021-10-15 20:19:05,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:19:05,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:05,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:05,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:05,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:19:05,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:19:05,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:19:05,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 20:19:05,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:06,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:06,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708960836] [2021-10-15 20:19:06,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:06,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701169410] [2021-10-15 20:19:06,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701169410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:19:06,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:19:06,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 20:19:06,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963996569] [2021-10-15 20:19:06,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:19:06,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:06,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:19:06,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:19:06,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2021-10-15 20:19:06,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 405 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 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 20:19:06,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:06,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2021-10-15 20:19:06,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:06,313 INFO L129 PetriNetUnfolder]: 6/134 cut-off events. [2021-10-15 20:19:06,313 INFO L130 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2021-10-15 20:19:06,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 134 events. 6/134 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 328 event pairs, 0 based on Foata normal form. 13/147 useless extension candidates. Maximal degree in co-relation 567. Up to 40 conditions per place. [2021-10-15 20:19:06,315 INFO L132 encePairwiseOnDemand]: 40/53 looper letters, 65 selfloop transitions, 27 changer transitions 10/109 dead transitions. [2021-10-15 20:19:06,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 1005 flow [2021-10-15 20:19:06,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:19:06,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:19:06,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2021-10-15 20:19:06,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4025157232704403 [2021-10-15 20:19:06,318 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 192 transitions. [2021-10-15 20:19:06,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 192 transitions. [2021-10-15 20:19:06,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:06,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 192 transitions. [2021-10-15 20:19:06,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 21.333333333333332) internal successors, (192), 9 states have internal predecessors, (192), 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 20:19:06,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 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 20:19:06,322 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 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 20:19:06,322 INFO L186 Difference]: Start difference. First operand has 60 places, 54 transitions, 405 flow. Second operand 9 states and 192 transitions. [2021-10-15 20:19:06,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 1005 flow [2021-10-15 20:19:06,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 109 transitions, 991 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-10-15 20:19:06,340 INFO L242 Difference]: Finished difference. Result has 73 places, 68 transitions, 667 flow [2021-10-15 20:19:06,340 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=667, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2021-10-15 20:19:06,340 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 38 predicate places. [2021-10-15 20:19:06,341 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 667 flow [2021-10-15 20:19:06,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 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 20:19:06,341 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:06,341 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] [2021-10-15 20:19:06,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:06,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:06,558 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:06,558 INFO L82 PathProgramCache]: Analyzing trace with hash 115055918, now seen corresponding path program 1 times [2021-10-15 20:19:06,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:06,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928509152] [2021-10-15 20:19:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:06,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:06,575 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:06,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468829259] [2021-10-15 20:19:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:06,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:06,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:06,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:06,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:19:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:06,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-15 20:19:06,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:07,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:07,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928509152] [2021-10-15 20:19:07,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:07,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468829259] [2021-10-15 20:19:07,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468829259] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:19:07,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:19:07,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 20:19:07,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345260724] [2021-10-15 20:19:07,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:19:07,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:07,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:19:07,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:19:07,269 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2021-10-15 20:19:07,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 667 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:07,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:07,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2021-10-15 20:19:07,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:07,459 INFO L129 PetriNetUnfolder]: 6/123 cut-off events. [2021-10-15 20:19:07,459 INFO L130 PetriNetUnfolder]: For 498/498 co-relation queries the response was YES. [2021-10-15 20:19:07,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 123 events. 6/123 cut-off events. For 498/498 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 259 event pairs, 0 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 581. Up to 79 conditions per place. [2021-10-15 20:19:07,462 INFO L132 encePairwiseOnDemand]: 46/53 looper letters, 69 selfloop transitions, 8 changer transitions 3/87 dead transitions. [2021-10-15 20:19:07,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 87 transitions, 928 flow [2021-10-15 20:19:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:19:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:19:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2021-10-15 20:19:07,464 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36556603773584906 [2021-10-15 20:19:07,464 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 155 transitions. [2021-10-15 20:19:07,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 155 transitions. [2021-10-15 20:19:07,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:07,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 155 transitions. [2021-10-15 20:19:07,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.375) internal successors, (155), 8 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 20:19:07,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 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 20:19:07,468 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 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 20:19:07,468 INFO L186 Difference]: Start difference. First operand has 73 places, 68 transitions, 667 flow. Second operand 8 states and 155 transitions. [2021-10-15 20:19:07,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 87 transitions, 928 flow [2021-10-15 20:19:07,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 886 flow, removed 21 selfloop flow, removed 0 redundant places. [2021-10-15 20:19:07,481 INFO L242 Difference]: Finished difference. Result has 82 places, 69 transitions, 658 flow [2021-10-15 20:19:07,481 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=658, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2021-10-15 20:19:07,482 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 47 predicate places. [2021-10-15 20:19:07,482 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 658 flow [2021-10-15 20:19:07,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:07,482 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:07,483 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:07,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:07,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:07,710 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:07,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1492250324, now seen corresponding path program 1 times [2021-10-15 20:19:07,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:07,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397198215] [2021-10-15 20:19:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:07,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:07,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:07,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945070914] [2021-10-15 20:19:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:07,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:07,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:07,743 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:07,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:19:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 20:19:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:08,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:08,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397198215] [2021-10-15 20:19:08,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:08,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945070914] [2021-10-15 20:19:08,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945070914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:19:08,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:19:08,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 20:19:08,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420627770] [2021-10-15 20:19:08,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:19:08,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:08,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:19:08,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:19:08,518 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2021-10-15 20:19:08,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 658 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:08,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:08,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2021-10-15 20:19:08,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:08,720 INFO L129 PetriNetUnfolder]: 6/121 cut-off events. [2021-10-15 20:19:08,721 INFO L130 PetriNetUnfolder]: For 455/455 co-relation queries the response was YES. [2021-10-15 20:19:08,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 121 events. 6/121 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 241 event pairs, 0 based on Foata normal form. 1/122 useless extension candidates. Maximal degree in co-relation 571. Up to 80 conditions per place. [2021-10-15 20:19:08,723 INFO L132 encePairwiseOnDemand]: 43/53 looper letters, 56 selfloop transitions, 7 changer transitions 16/86 dead transitions. [2021-10-15 20:19:08,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 906 flow [2021-10-15 20:19:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:19:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:19:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2021-10-15 20:19:08,725 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3608490566037736 [2021-10-15 20:19:08,726 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 153 transitions. [2021-10-15 20:19:08,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 153 transitions. [2021-10-15 20:19:08,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:08,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 153 transitions. [2021-10-15 20:19:08,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 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 20:19:08,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 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 20:19:08,730 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 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 20:19:08,730 INFO L186 Difference]: Start difference. First operand has 82 places, 69 transitions, 658 flow. Second operand 8 states and 153 transitions. [2021-10-15 20:19:08,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 906 flow [2021-10-15 20:19:08,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 899 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 20:19:08,744 INFO L242 Difference]: Finished difference. Result has 87 places, 62 transitions, 569 flow [2021-10-15 20:19:08,744 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=569, PETRI_PLACES=87, PETRI_TRANSITIONS=62} [2021-10-15 20:19:08,745 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 52 predicate places. [2021-10-15 20:19:08,745 INFO L470 AbstractCegarLoop]: Abstraction has has 87 places, 62 transitions, 569 flow [2021-10-15 20:19:08,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:08,746 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:08,746 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:08,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:08,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-15 20:19:08,962 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:08,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:08,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1670816768, now seen corresponding path program 3 times [2021-10-15 20:19:08,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:08,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999143476] [2021-10-15 20:19:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:08,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:08,980 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:08,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142410686] [2021-10-15 20:19:08,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:19:08,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:08,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:08,982 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:09,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:19:09,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 20:19:09,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:19:09,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 20:19:09,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-15 20:19:09,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:09,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999143476] [2021-10-15 20:19:09,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:09,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142410686] [2021-10-15 20:19:09,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142410686] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:19:09,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:19:09,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 20:19:09,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041402715] [2021-10-15 20:19:09,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:19:09,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:19:09,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:19:09,499 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2021-10-15 20:19:09,499 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 62 transitions, 569 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 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 20:19:09,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:09,500 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2021-10-15 20:19:09,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:09,750 INFO L129 PetriNetUnfolder]: 6/106 cut-off events. [2021-10-15 20:19:09,750 INFO L130 PetriNetUnfolder]: For 451/451 co-relation queries the response was YES. [2021-10-15 20:19:09,751 INFO L84 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 106 events. 6/106 cut-off events. For 451/451 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 181 event pairs, 0 based on Foata normal form. 5/111 useless extension candidates. Maximal degree in co-relation 508. Up to 32 conditions per place. [2021-10-15 20:19:09,752 INFO L132 encePairwiseOnDemand]: 42/53 looper letters, 33 selfloop transitions, 29 changer transitions 1/68 dead transitions. [2021-10-15 20:19:09,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 68 transitions, 757 flow [2021-10-15 20:19:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:19:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:19:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2021-10-15 20:19:09,755 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3553459119496855 [2021-10-15 20:19:09,755 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 113 transitions. [2021-10-15 20:19:09,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 113 transitions. [2021-10-15 20:19:09,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:09,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 113 transitions. [2021-10-15 20:19:09,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:09,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 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 20:19:09,759 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 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 20:19:09,759 INFO L186 Difference]: Start difference. First operand has 87 places, 62 transitions, 569 flow. Second operand 6 states and 113 transitions. [2021-10-15 20:19:09,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 68 transitions, 757 flow [2021-10-15 20:19:09,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 68 transitions, 691 flow, removed 21 selfloop flow, removed 12 redundant places. [2021-10-15 20:19:09,771 INFO L242 Difference]: Finished difference. Result has 73 places, 61 transitions, 599 flow [2021-10-15 20:19:09,772 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=599, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2021-10-15 20:19:09,772 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 38 predicate places. [2021-10-15 20:19:09,772 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 599 flow [2021-10-15 20:19:09,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 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 20:19:09,773 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:09,773 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:09,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:09,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 20:19:09,989 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:09,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1996519097, now seen corresponding path program 2 times [2021-10-15 20:19:09,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:09,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905788551] [2021-10-15 20:19:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:09,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:10,009 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:10,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207088839] [2021-10-15 20:19:10,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:19:10,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:10,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:10,011 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:10,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:19:10,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:19:10,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:19:10,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-15 20:19:10,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:10,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:10,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905788551] [2021-10-15 20:19:10,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:10,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207088839] [2021-10-15 20:19:10,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207088839] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:19:10,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:19:10,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 20:19:10,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83423758] [2021-10-15 20:19:10,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:19:10,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:19:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:19:10,908 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2021-10-15 20:19:10,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 599 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 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 20:19:10,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:10,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2021-10-15 20:19:10,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:11,193 INFO L129 PetriNetUnfolder]: 5/114 cut-off events. [2021-10-15 20:19:11,193 INFO L130 PetriNetUnfolder]: For 476/476 co-relation queries the response was YES. [2021-10-15 20:19:11,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 114 events. 5/114 cut-off events. For 476/476 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 240 event pairs, 0 based on Foata normal form. 2/116 useless extension candidates. Maximal degree in co-relation 547. Up to 53 conditions per place. [2021-10-15 20:19:11,197 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 72 selfloop transitions, 15 changer transitions 4/96 dead transitions. [2021-10-15 20:19:11,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 96 transitions, 989 flow [2021-10-15 20:19:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:19:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:19:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2021-10-15 20:19:11,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38784067085953877 [2021-10-15 20:19:11,201 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 185 transitions. [2021-10-15 20:19:11,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 185 transitions. [2021-10-15 20:19:11,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:11,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 185 transitions. [2021-10-15 20:19:11,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 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 20:19:11,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 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 20:19:11,206 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 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 20:19:11,206 INFO L186 Difference]: Start difference. First operand has 73 places, 61 transitions, 599 flow. Second operand 9 states and 185 transitions. [2021-10-15 20:19:11,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 96 transitions, 989 flow [2021-10-15 20:19:11,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 96 transitions, 962 flow, removed 11 selfloop flow, removed 3 redundant places. [2021-10-15 20:19:11,223 INFO L242 Difference]: Finished difference. Result has 81 places, 68 transitions, 687 flow [2021-10-15 20:19:11,224 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=687, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2021-10-15 20:19:11,224 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 46 predicate places. [2021-10-15 20:19:11,224 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 687 flow [2021-10-15 20:19:11,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 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 20:19:11,225 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:11,226 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:11,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:11,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 20:19:11,442 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:11,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1808046758, now seen corresponding path program 3 times [2021-10-15 20:19:11,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:11,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431455903] [2021-10-15 20:19:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:11,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:11,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:11,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96477557] [2021-10-15 20:19:11,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:19:11,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:11,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:11,490 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:11,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:19:11,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 20:19:11,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:19:11,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-15 20:19:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:12,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:12,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431455903] [2021-10-15 20:19:12,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:12,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96477557] [2021-10-15 20:19:12,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96477557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:19:12,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:19:12,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 20:19:12,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991682674] [2021-10-15 20:19:12,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:19:12,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:12,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:19:12,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:19:12,695 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2021-10-15 20:19:12,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 687 flow. Second operand has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 9 states have internal predecessors, (145), 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 20:19:12,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:12,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2021-10-15 20:19:12,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:13,162 INFO L129 PetriNetUnfolder]: 4/120 cut-off events. [2021-10-15 20:19:13,163 INFO L130 PetriNetUnfolder]: For 485/485 co-relation queries the response was YES. [2021-10-15 20:19:13,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 120 events. 4/120 cut-off events. For 485/485 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 289 event pairs, 0 based on Foata normal form. 2/122 useless extension candidates. Maximal degree in co-relation 587. Up to 51 conditions per place. [2021-10-15 20:19:13,164 INFO L132 encePairwiseOnDemand]: 44/53 looper letters, 73 selfloop transitions, 14 changer transitions 12/104 dead transitions. [2021-10-15 20:19:13,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 104 transitions, 1081 flow [2021-10-15 20:19:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:19:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:19:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2021-10-15 20:19:13,168 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37735849056603776 [2021-10-15 20:19:13,168 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 220 transitions. [2021-10-15 20:19:13,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 220 transitions. [2021-10-15 20:19:13,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:13,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 220 transitions. [2021-10-15 20:19:13,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 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 20:19:13,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 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 20:19:13,173 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 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 20:19:13,173 INFO L186 Difference]: Start difference. First operand has 81 places, 68 transitions, 687 flow. Second operand 11 states and 220 transitions. [2021-10-15 20:19:13,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 104 transitions, 1081 flow [2021-10-15 20:19:13,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 104 transitions, 1074 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 20:19:13,185 INFO L242 Difference]: Finished difference. Result has 91 places, 67 transitions, 702 flow [2021-10-15 20:19:13,186 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=702, PETRI_PLACES=91, PETRI_TRANSITIONS=67} [2021-10-15 20:19:13,186 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 56 predicate places. [2021-10-15 20:19:13,187 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 67 transitions, 702 flow [2021-10-15 20:19:13,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.11111111111111) internal successors, (145), 9 states have internal predecessors, (145), 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 20:19:13,187 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:13,187 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:13,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:13,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 20:19:13,410 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:13,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:13,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1415019748, now seen corresponding path program 1 times [2021-10-15 20:19:13,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:13,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182504693] [2021-10-15 20:19:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:13,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:13,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:13,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779479410] [2021-10-15 20:19:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:13,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:13,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:13,445 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:13,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 20:19:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:13,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:19:13,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 20:19:14,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:14,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182504693] [2021-10-15 20:19:14,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:14,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779479410] [2021-10-15 20:19:14,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779479410] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:14,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:14,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:19:14,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773014142] [2021-10-15 20:19:14,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:19:14,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:14,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:19:14,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:19:14,168 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 53 [2021-10-15 20:19:14,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 67 transitions, 702 flow. Second operand has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 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 20:19:14,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:14,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 53 [2021-10-15 20:19:14,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:14,307 INFO L129 PetriNetUnfolder]: 4/114 cut-off events. [2021-10-15 20:19:14,308 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2021-10-15 20:19:14,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 502 conditions, 114 events. 4/114 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 146 event pairs, 0 based on Foata normal form. 2/116 useless extension candidates. Maximal degree in co-relation 475. Up to 18 conditions per place. [2021-10-15 20:19:14,309 INFO L132 encePairwiseOnDemand]: 48/53 looper letters, 38 selfloop transitions, 10 changer transitions 2/72 dead transitions. [2021-10-15 20:19:14,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 72 transitions, 748 flow [2021-10-15 20:19:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:19:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:19:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 206 transitions. [2021-10-15 20:19:14,312 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6477987421383647 [2021-10-15 20:19:14,312 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 206 transitions. [2021-10-15 20:19:14,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 206 transitions. [2021-10-15 20:19:14,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:14,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 206 transitions. [2021-10-15 20:19:14,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 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 20:19:14,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 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 20:19:14,316 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 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 20:19:14,316 INFO L186 Difference]: Start difference. First operand has 91 places, 67 transitions, 702 flow. Second operand 6 states and 206 transitions. [2021-10-15 20:19:14,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 72 transitions, 748 flow [2021-10-15 20:19:14,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 72 transitions, 700 flow, removed 4 selfloop flow, removed 12 redundant places. [2021-10-15 20:19:14,327 INFO L242 Difference]: Finished difference. Result has 85 places, 58 transitions, 544 flow [2021-10-15 20:19:14,327 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=544, PETRI_PLACES=85, PETRI_TRANSITIONS=58} [2021-10-15 20:19:14,327 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 50 predicate places. [2021-10-15 20:19:14,328 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 58 transitions, 544 flow [2021-10-15 20:19:14,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 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 20:19:14,328 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:14,328 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:14,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:14,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 20:19:14,554 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:14,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1666655538, now seen corresponding path program 4 times [2021-10-15 20:19:14,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:14,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566486084] [2021-10-15 20:19:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:14,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:14,570 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:14,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59015869] [2021-10-15 20:19:14,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:19:14,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:14,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:14,572 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:14,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 20:19:14,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:19:14,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:19:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-15 20:19:14,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:15,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:15,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566486084] [2021-10-15 20:19:15,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:15,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59015869] [2021-10-15 20:19:15,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59015869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:19:15,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:19:15,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 20:19:15,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438194498] [2021-10-15 20:19:15,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:19:15,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:19:15,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:19:15,955 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2021-10-15 20:19:15,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 58 transitions, 544 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 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 20:19:15,956 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:15,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2021-10-15 20:19:15,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:16,356 INFO L129 PetriNetUnfolder]: 7/171 cut-off events. [2021-10-15 20:19:16,357 INFO L130 PetriNetUnfolder]: For 493/493 co-relation queries the response was YES. [2021-10-15 20:19:16,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 171 events. 7/171 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 452 event pairs, 0 based on Foata normal form. 3/174 useless extension candidates. Maximal degree in co-relation 737. Up to 74 conditions per place. [2021-10-15 20:19:16,360 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 83 selfloop transitions, 15 changer transitions 2/105 dead transitions. [2021-10-15 20:19:16,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 105 transitions, 1072 flow [2021-10-15 20:19:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:19:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:19:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2021-10-15 20:19:16,363 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3867924528301887 [2021-10-15 20:19:16,363 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 205 transitions. [2021-10-15 20:19:16,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 205 transitions. [2021-10-15 20:19:16,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:16,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 205 transitions. [2021-10-15 20:19:16,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 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 20:19:16,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 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 20:19:16,367 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 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 20:19:16,368 INFO L186 Difference]: Start difference. First operand has 85 places, 58 transitions, 544 flow. Second operand 10 states and 205 transitions. [2021-10-15 20:19:16,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 105 transitions, 1072 flow [2021-10-15 20:19:16,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 105 transitions, 1051 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:19:16,380 INFO L242 Difference]: Finished difference. Result has 98 places, 65 transitions, 659 flow [2021-10-15 20:19:16,381 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=659, PETRI_PLACES=98, PETRI_TRANSITIONS=65} [2021-10-15 20:19:16,381 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 63 predicate places. [2021-10-15 20:19:16,381 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 65 transitions, 659 flow [2021-10-15 20:19:16,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 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 20:19:16,382 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:16,382 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:16,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:16,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 20:19:16,600 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:16,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1273273436, now seen corresponding path program 2 times [2021-10-15 20:19:16,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:16,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106258187] [2021-10-15 20:19:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:16,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:16,616 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:16,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046048097] [2021-10-15 20:19:16,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:19:16,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:16,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:16,619 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:16,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 20:19:17,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-15 20:19:17,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:19:17,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-15 20:19:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-15 20:19:17,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:17,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106258187] [2021-10-15 20:19:17,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:17,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046048097] [2021-10-15 20:19:17,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046048097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:19:17,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:19:17,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 20:19:17,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141334292] [2021-10-15 20:19:17,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:19:17,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:19:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:19:17,558 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2021-10-15 20:19:17,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 65 transitions, 659 flow. Second operand has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 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 20:19:17,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:17,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2021-10-15 20:19:17,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:17,899 INFO L129 PetriNetUnfolder]: 7/139 cut-off events. [2021-10-15 20:19:17,900 INFO L130 PetriNetUnfolder]: For 564/564 co-relation queries the response was YES. [2021-10-15 20:19:17,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 139 events. 7/139 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 268 event pairs, 0 based on Foata normal form. 16/155 useless extension candidates. Maximal degree in co-relation 717. Up to 52 conditions per place. [2021-10-15 20:19:17,901 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2021-10-15 20:19:17,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 64 transitions, 789 flow [2021-10-15 20:19:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:19:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:19:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2021-10-15 20:19:17,904 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3288409703504043 [2021-10-15 20:19:17,904 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 122 transitions. [2021-10-15 20:19:17,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 122 transitions. [2021-10-15 20:19:17,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:17,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 122 transitions. [2021-10-15 20:19:17,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 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 20:19:17,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 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 20:19:17,907 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 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 20:19:17,908 INFO L186 Difference]: Start difference. First operand has 98 places, 65 transitions, 659 flow. Second operand 7 states and 122 transitions. [2021-10-15 20:19:17,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 64 transitions, 789 flow [2021-10-15 20:19:17,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 64 transitions, 745 flow, removed 7 selfloop flow, removed 7 redundant places. [2021-10-15 20:19:17,921 INFO L242 Difference]: Finished difference. Result has 91 places, 0 transitions, 0 flow [2021-10-15 20:19:17,922 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=91, PETRI_TRANSITIONS=0} [2021-10-15 20:19:17,922 INFO L334 CegarLoopForPetriNet]: 35 programPoint places, 56 predicate places. [2021-10-15 20:19:17,922 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 0 transitions, 0 flow [2021-10-15 20:19:17,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 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 20:19:17,928 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:17,928 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:17,929 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:17,929 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:17,929 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:17,930 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:17,930 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:17,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:18,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:18,152 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:19:18,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:19:18 BoogieIcfgContainer [2021-10-15 20:19:18,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:19:18,158 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:19:18,159 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:19:18,159 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:19:18,160 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:19:02" (3/4) ... [2021-10-15 20:19:18,163 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:19:18,178 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-15 20:19:18,178 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:19:18,179 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:19:18,179 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:19:18,240 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:19:18,241 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:19:18,243 INFO L168 Benchmark]: Toolchain (without parser) took 16805.96 ms. Allocated memory was 104.9 MB in the beginning and 165.7 MB in the end (delta: 60.8 MB). Free memory was 71.5 MB in the beginning and 87.1 MB in the end (delta: -15.6 MB). Peak memory consumption was 45.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:18,243 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 104.9 MB. Free memory is still 58.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:19:18,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.76 ms. Allocated memory is still 104.9 MB. Free memory was 71.3 MB in the beginning and 80.1 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:18,244 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.96 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:18,245 INFO L168 Benchmark]: Boogie Preprocessor took 28.74 ms. Allocated memory is still 104.9 MB. Free memory was 78.4 MB in the beginning and 77.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:18,246 INFO L168 Benchmark]: RCFGBuilder took 503.37 ms. Allocated memory is still 104.9 MB. Free memory was 77.4 MB in the beginning and 66.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:18,246 INFO L168 Benchmark]: TraceAbstraction took 15804.21 ms. Allocated memory was 104.9 MB in the beginning and 165.7 MB in the end (delta: 60.8 MB). Free memory was 66.2 MB in the beginning and 90.1 MB in the end (delta: -23.9 MB). Peak memory consumption was 40.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:18,247 INFO L168 Benchmark]: Witness Printer took 82.43 ms. Allocated memory is still 165.7 MB. Free memory was 90.1 MB in the beginning and 87.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:18,250 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 104.9 MB. Free memory is still 58.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 332.76 ms. Allocated memory is still 104.9 MB. Free memory was 71.3 MB in the beginning and 80.1 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.96 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.74 ms. Allocated memory is still 104.9 MB. Free memory was 78.4 MB in the beginning and 77.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 503.37 ms. Allocated memory is still 104.9 MB. Free memory was 77.4 MB in the beginning and 66.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15804.21 ms. Allocated memory was 104.9 MB in the beginning and 165.7 MB in the end (delta: 60.8 MB). Free memory was 66.2 MB in the beginning and 90.1 MB in the end (delta: -23.9 MB). Peak memory consumption was 40.0 MB. Max. memory is 16.1 GB. * Witness Printer took 82.43 ms. Allocated memory is still 165.7 MB. Free memory was 90.1 MB in the beginning and 87.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: 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, 39 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 15715.6ms, OverallIterations: 15, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 3615.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 64.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 185 SDtfs, 422 SDslu, 343 SDs, 0 SdLazy, 1711 SolverSat, 313 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1477.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 395 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1278.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=702occurred in iteration=12, InterpolantAutomatonStates: 102, 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: 109.4ms SsaConstructionTime, 395.3ms SatisfiabilityAnalysisTime, 6101.2ms InterpolantComputationTime, 382 NumberOfCodeBlocks, 340 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 367 ConstructedInterpolants, 0 QuantifiedInterpolants, 3778 SizeOfPredicates, 73 NumberOfNonLiveVariables, 1295 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 92/251 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 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:19:18,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35ada71-5079-4666-b85c-99afe60aeb1f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...