./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound5.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_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/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_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/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_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/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 b3bfce9b07227c60fd873a49b64f66306f8aea80 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:08:44,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:08:44,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:08:44,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:08:44,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:08:44,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:08:44,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:08:44,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:08:44,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:08:44,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:08:44,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:08:44,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:08:44,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:08:44,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:08:44,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:08:44,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:08:44,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:08:44,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:08:44,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:08:44,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:08:44,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:08:44,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:08:45,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:08:45,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:08:45,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:08:45,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:08:45,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:08:45,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:08:45,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:08:45,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:08:45,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:08:45,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:08:45,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:08:45,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:08:45,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:08:45,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:08:45,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:08:45,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:08:45,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:08:45,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:08:45,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:08:45,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:08:45,062 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:08:45,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:08:45,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:08:45,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:08:45,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:08:45,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:08:45,066 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:08:45,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:08:45,067 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:08:45,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:08:45,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:08:45,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:08:45,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:08:45,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:08:45,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:08:45,070 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:08:45,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:08:45,070 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:08:45,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:08:45,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:08:45,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:08:45,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:08:45,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:08:45,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:08:45,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:08:45,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:08:45,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:08:45,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:08:45,075 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:08:45,075 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:08:45,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:08:45,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:08:45,076 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_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3bfce9b07227c60fd873a49b64f66306f8aea80 [2021-10-15 19:08:45,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:08:45,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:08:45,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:08:45,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:08:45,390 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:08:45,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound5.c [2021-10-15 19:08:45,481 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/data/121b7f316/3b6683f4c60a47219477d3c2bf5f0fb0/FLAG356449973 [2021-10-15 19:08:46,117 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:08:46,119 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound5.c [2021-10-15 19:08:46,131 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/data/121b7f316/3b6683f4c60a47219477d3c2bf5f0fb0/FLAG356449973 [2021-10-15 19:08:46,465 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/data/121b7f316/3b6683f4c60a47219477d3c2bf5f0fb0 [2021-10-15 19:08:46,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:08:46,470 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:08:46,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:08:46,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:08:46,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:08:46,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7882aeaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46, skipping insertion in model container [2021-10-15 19:08:46,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:08:46,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:08:46,732 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_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound5.c[546,559] [2021-10-15 19:08:46,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:08:46,767 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:08:46,786 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_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound5.c[546,559] [2021-10-15 19:08:46,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:08:46,817 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:08:46,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46 WrapperNode [2021-10-15 19:08:46,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:08:46,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:08:46,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:08:46,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:08:46,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:08:46,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:08:46,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:08:46,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:08:46,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:08:46,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:08:46,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:08:46,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:08:46,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46" (1/1) ... [2021-10-15 19:08:46,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:08:46,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:46,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:08:46,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:08:47,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:08:47,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:08:47,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:08:47,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:08:47,253 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:08:47,253 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-15 19:08:47,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:08:47 BoogieIcfgContainer [2021-10-15 19:08:47,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:08:47,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:08:47,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:08:47,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:08:47,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:08:46" (1/3) ... [2021-10-15 19:08:47,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:08:47, skipping insertion in model container [2021-10-15 19:08:47,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:46" (2/3) ... [2021-10-15 19:08:47,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:08:47, skipping insertion in model container [2021-10-15 19:08:47,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:08:47" (3/3) ... [2021-10-15 19:08:47,267 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound5.c [2021-10-15 19:08:47,274 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:08:47,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 19:08:47,337 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:08:47,345 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:08:47,346 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 19:08:47,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 26 transitions, 52 flow [2021-10-15 19:08:47,384 INFO L129 PetriNetUnfolder]: 7/26 cut-off events. [2021-10-15 19:08:47,384 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:08:47,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 26 events. 7/26 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:08:47,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 26 transitions, 52 flow [2021-10-15 19:08:47,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 21 transitions, 42 flow [2021-10-15 19:08:47,397 INFO L129 PetriNetUnfolder]: 6/19 cut-off events. [2021-10-15 19:08:47,398 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:08:47,398 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:47,399 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:47,400 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1178941392, now seen corresponding path program 1 times [2021-10-15 19:08:47,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:47,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030885363] [2021-10-15 19:08:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:47,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:08:47,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:47,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030885363] [2021-10-15 19:08:47,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030885363] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:08:47,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:08:47,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:08:47,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626681670] [2021-10-15 19:08:47,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:08:47,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:08:47,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:08:47,627 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 26 [2021-10-15 19:08:47,639 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 21 transitions, 42 flow. Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:47,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:47,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 26 [2021-10-15 19:08:47,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:47,654 INFO L129 PetriNetUnfolder]: 2/17 cut-off events. [2021-10-15 19:08:47,658 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:08:47,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 17 events. 2/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 4/18 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2021-10-15 19:08:47,664 INFO L132 encePairwiseOnDemand]: 22/26 looper letters, 0 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2021-10-15 19:08:47,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 17 transitions, 34 flow [2021-10-15 19:08:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:08:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:08:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 46 transitions. [2021-10-15 19:08:47,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8846153846153846 [2021-10-15 19:08:47,681 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 46 transitions. [2021-10-15 19:08:47,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 46 transitions. [2021-10-15 19:08:47,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:47,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 46 transitions. [2021-10-15 19:08:47,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:47,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:47,704 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:47,707 INFO L186 Difference]: Start difference. First operand has 16 places, 21 transitions, 42 flow. Second operand 2 states and 46 transitions. [2021-10-15 19:08:47,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 17 transitions, 34 flow [2021-10-15 19:08:47,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 17 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:08:47,716 INFO L242 Difference]: Finished difference. Result has 17 places, 17 transitions, 34 flow [2021-10-15 19:08:47,718 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=34, PETRI_PLACES=17, PETRI_TRANSITIONS=17} [2021-10-15 19:08:47,720 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 1 predicate places. [2021-10-15 19:08:47,720 INFO L470 AbstractCegarLoop]: Abstraction has has 17 places, 17 transitions, 34 flow [2021-10-15 19:08:47,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:47,721 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:47,721 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:47,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:08:47,722 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:47,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:47,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-15 19:08:47,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:47,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866575797] [2021-10-15 19:08:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:47,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:47,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:47,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664285803] [2021-10-15 19:08:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:47,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:47,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:47,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:47,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:08:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:08:47,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:08:48,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:48,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866575797] [2021-10-15 19:08:48,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:08:48,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664285803] [2021-10-15 19:08:48,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664285803] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:08:48,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:08:48,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:08:48,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039214204] [2021-10-15 19:08:48,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:08:48,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:48,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:08:48,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:08:48,140 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 26 [2021-10-15 19:08:48,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 17 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:48,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:48,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 26 [2021-10-15 19:08:48,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:48,222 INFO L129 PetriNetUnfolder]: 4/29 cut-off events. [2021-10-15 19:08:48,222 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:08:48,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 29 events. 4/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 44. Up to 10 conditions per place. [2021-10-15 19:08:48,223 INFO L132 encePairwiseOnDemand]: 20/26 looper letters, 8 selfloop transitions, 5 changer transitions 2/24 dead transitions. [2021-10-15 19:08:48,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 78 flow [2021-10-15 19:08:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:08:48,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:08:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-10-15 19:08:48,227 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5923076923076923 [2021-10-15 19:08:48,227 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-10-15 19:08:48,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-10-15 19:08:48,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:48,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-10-15 19:08:48,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:48,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:48,233 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:48,233 INFO L186 Difference]: Start difference. First operand has 17 places, 17 transitions, 34 flow. Second operand 5 states and 77 transitions. [2021-10-15 19:08:48,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 78 flow [2021-10-15 19:08:48,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 78 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:08:48,237 INFO L242 Difference]: Finished difference. Result has 24 places, 21 transitions, 73 flow [2021-10-15 19:08:48,237 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=73, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2021-10-15 19:08:48,238 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 8 predicate places. [2021-10-15 19:08:48,239 INFO L470 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 73 flow [2021-10-15 19:08:48,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:48,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:48,240 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:48,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:48,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-15 19:08:48,459 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:48,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1782419994, now seen corresponding path program 1 times [2021-10-15 19:08:48,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:48,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137078092] [2021-10-15 19:08:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:48,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:48,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:48,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119209861] [2021-10-15 19:08:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:48,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:48,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:48,517 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:48,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:08:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:48,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:08:48,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:08:48,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:48,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137078092] [2021-10-15 19:08:48,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:08:48,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119209861] [2021-10-15 19:08:48,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119209861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:08:48,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:08:48,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:08:48,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623122375] [2021-10-15 19:08:48,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:08:48,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:08:48,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:08:48,808 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 26 [2021-10-15 19:08:48,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 73 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:48,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:48,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 26 [2021-10-15 19:08:48,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:48,894 INFO L129 PetriNetUnfolder]: 4/35 cut-off events. [2021-10-15 19:08:48,894 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2021-10-15 19:08:48,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 35 events. 4/35 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 2/37 useless extension candidates. Maximal degree in co-relation 77. Up to 10 conditions per place. [2021-10-15 19:08:48,896 INFO L132 encePairwiseOnDemand]: 20/26 looper letters, 10 selfloop transitions, 6 changer transitions 2/27 dead transitions. [2021-10-15 19:08:48,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 137 flow [2021-10-15 19:08:48,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:08:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:08:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2021-10-15 19:08:48,900 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2021-10-15 19:08:48,900 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 91 transitions. [2021-10-15 19:08:48,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 91 transitions. [2021-10-15 19:08:48,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:48,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 91 transitions. [2021-10-15 19:08:48,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:48,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:48,906 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:48,906 INFO L186 Difference]: Start difference. First operand has 24 places, 21 transitions, 73 flow. Second operand 6 states and 91 transitions. [2021-10-15 19:08:48,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 137 flow [2021-10-15 19:08:48,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 135 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-10-15 19:08:48,911 INFO L242 Difference]: Finished difference. Result has 31 places, 23 transitions, 111 flow [2021-10-15 19:08:48,912 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2021-10-15 19:08:48,912 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 15 predicate places. [2021-10-15 19:08:48,912 INFO L470 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 111 flow [2021-10-15 19:08:48,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:48,913 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:48,913 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:48,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:49,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:49,140 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:49,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:49,141 INFO L82 PathProgramCache]: Analyzing trace with hash 397544518, now seen corresponding path program 2 times [2021-10-15 19:08:49,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:49,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611251427] [2021-10-15 19:08:49,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:49,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:49,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:49,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905274460] [2021-10-15 19:08:49,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:08:49,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:49,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:49,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:49,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:08:49,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:08:49,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:08:49,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-15 19:08:49,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:08:49,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:49,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611251427] [2021-10-15 19:08:49,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:08:49,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905274460] [2021-10-15 19:08:49,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905274460] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:08:49,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:08:49,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:08:49,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815246007] [2021-10-15 19:08:49,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:08:49,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:08:49,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:08:49,924 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 26 [2021-10-15 19:08:49,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 111 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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 19:08:49,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:49,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 26 [2021-10-15 19:08:49,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:50,118 INFO L129 PetriNetUnfolder]: 4/41 cut-off events. [2021-10-15 19:08:50,118 INFO L130 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2021-10-15 19:08:50,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 41 events. 4/41 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 2/43 useless extension candidates. Maximal degree in co-relation 109. Up to 10 conditions per place. [2021-10-15 19:08:50,120 INFO L132 encePairwiseOnDemand]: 20/26 looper letters, 11 selfloop transitions, 8 changer transitions 2/30 dead transitions. [2021-10-15 19:08:50,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 195 flow [2021-10-15 19:08:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:08:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:08:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2021-10-15 19:08:50,123 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2021-10-15 19:08:50,124 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 118 transitions. [2021-10-15 19:08:50,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 118 transitions. [2021-10-15 19:08:50,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:50,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 118 transitions. [2021-10-15 19:08:50,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:50,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 26.0) internal successors, (234), 9 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:50,129 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 26.0) internal successors, (234), 9 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:50,130 INFO L186 Difference]: Start difference. First operand has 31 places, 23 transitions, 111 flow. Second operand 8 states and 118 transitions. [2021-10-15 19:08:50,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 195 flow [2021-10-15 19:08:50,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 176 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-10-15 19:08:50,136 INFO L242 Difference]: Finished difference. Result has 37 places, 25 transitions, 145 flow [2021-10-15 19:08:50,137 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=145, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2021-10-15 19:08:50,137 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 21 predicate places. [2021-10-15 19:08:50,137 INFO L470 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 145 flow [2021-10-15 19:08:50,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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 19:08:50,138 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:50,138 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:50,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:50,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:50,364 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:50,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1530556302, now seen corresponding path program 3 times [2021-10-15 19:08:50,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:50,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638867978] [2021-10-15 19:08:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:50,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:50,385 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:50,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004580428] [2021-10-15 19:08:50,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:08:50,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:50,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:50,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:50,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:08:50,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:08:50,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:08:50,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-15 19:08:50,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:08:50,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:50,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638867978] [2021-10-15 19:08:50,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:08:50,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004580428] [2021-10-15 19:08:50,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004580428] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:08:50,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:08:50,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:08:50,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335124646] [2021-10-15 19:08:50,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:08:50,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:50,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:08:50,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:08:50,941 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 26 [2021-10-15 19:08:50,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 145 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 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 19:08:50,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:50,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 26 [2021-10-15 19:08:50,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:53,226 INFO L129 PetriNetUnfolder]: 3/37 cut-off events. [2021-10-15 19:08:53,226 INFO L130 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2021-10-15 19:08:53,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 37 events. 3/37 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 100. Up to 13 conditions per place. [2021-10-15 19:08:53,228 INFO L132 encePairwiseOnDemand]: 22/26 looper letters, 11 selfloop transitions, 4 changer transitions 0/23 dead transitions. [2021-10-15 19:08:53,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 23 transitions, 165 flow [2021-10-15 19:08:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:08:53,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:08:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2021-10-15 19:08:53,230 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2021-10-15 19:08:53,230 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 69 transitions. [2021-10-15 19:08:53,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 69 transitions. [2021-10-15 19:08:53,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:53,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 69 transitions. [2021-10-15 19:08:53,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:53,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:53,233 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:53,233 INFO L186 Difference]: Start difference. First operand has 37 places, 25 transitions, 145 flow. Second operand 5 states and 69 transitions. [2021-10-15 19:08:53,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 23 transitions, 165 flow [2021-10-15 19:08:53,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 23 transitions, 130 flow, removed 11 selfloop flow, removed 6 redundant places. [2021-10-15 19:08:53,239 INFO L242 Difference]: Finished difference. Result has 33 places, 23 transitions, 108 flow [2021-10-15 19:08:53,239 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2021-10-15 19:08:53,239 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 17 predicate places. [2021-10-15 19:08:53,239 INFO L470 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 108 flow [2021-10-15 19:08:53,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 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 19:08:53,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:53,240 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:53,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:53,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:53,441 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:53,442 INFO L82 PathProgramCache]: Analyzing trace with hash -202648735, now seen corresponding path program 1 times [2021-10-15 19:08:53,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:53,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839524876] [2021-10-15 19:08:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:53,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:53,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:53,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765852839] [2021-10-15 19:08:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:53,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:53,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:53,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:53,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:08:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:53,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:08:53,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:08:53,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:53,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839524876] [2021-10-15 19:08:53,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:08:53,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765852839] [2021-10-15 19:08:53,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765852839] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:08:53,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:08:53,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:08:53,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366828817] [2021-10-15 19:08:53,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:08:53,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:08:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:08:53,738 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 26 [2021-10-15 19:08:53,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 108 flow. Second operand has 7 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 19:08:53,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:53,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 26 [2021-10-15 19:08:53,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:53,808 INFO L129 PetriNetUnfolder]: 2/32 cut-off events. [2021-10-15 19:08:53,808 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2021-10-15 19:08:53,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 32 events. 2/32 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 4/36 useless extension candidates. Maximal degree in co-relation 74. Up to 5 conditions per place. [2021-10-15 19:08:53,812 INFO L132 encePairwiseOnDemand]: 22/26 looper letters, 4 selfloop transitions, 9 changer transitions 0/26 dead transitions. [2021-10-15 19:08:53,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 136 flow [2021-10-15 19:08:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:08:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:08:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2021-10-15 19:08:53,820 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6807692307692308 [2021-10-15 19:08:53,820 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 177 transitions. [2021-10-15 19:08:53,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 177 transitions. [2021-10-15 19:08:53,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:53,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 177 transitions. [2021-10-15 19:08:53,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:53,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 26.0) internal successors, (286), 11 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:53,837 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 26.0) internal successors, (286), 11 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:53,837 INFO L186 Difference]: Start difference. First operand has 33 places, 23 transitions, 108 flow. Second operand 10 states and 177 transitions. [2021-10-15 19:08:53,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 136 flow [2021-10-15 19:08:53,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 26 transitions, 123 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-10-15 19:08:53,844 INFO L242 Difference]: Finished difference. Result has 42 places, 26 transitions, 133 flow [2021-10-15 19:08:53,845 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=133, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2021-10-15 19:08:53,845 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 26 predicate places. [2021-10-15 19:08:53,846 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 133 flow [2021-10-15 19:08:53,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 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 19:08:53,846 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:53,847 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:08:53,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:54,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:54,069 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:54,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1425077830, now seen corresponding path program 1 times [2021-10-15 19:08:54,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:54,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145223311] [2021-10-15 19:08:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:54,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:54,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:08:54,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081015770] [2021-10-15 19:08:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:54,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:54,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:54,088 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:08:54,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:08:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:08:54,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-15 19:08:54,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:54,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145223311] [2021-10-15 19:08:54,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:08:54,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081015770] [2021-10-15 19:08:54,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081015770] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:08:54,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:08:54,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:08:54,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916562911] [2021-10-15 19:08:54,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:08:54,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:54,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:08:54,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:08:54,395 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 26 [2021-10-15 19:08:54,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 26 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:54,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:54,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 26 [2021-10-15 19:08:54,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:54,504 INFO L129 PetriNetUnfolder]: 2/30 cut-off events. [2021-10-15 19:08:54,504 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2021-10-15 19:08:54,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 30 events. 2/30 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 1/31 useless extension candidates. Maximal degree in co-relation 87. Up to 13 conditions per place. [2021-10-15 19:08:54,505 INFO L132 encePairwiseOnDemand]: 22/26 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2021-10-15 19:08:54,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 24 transitions, 155 flow [2021-10-15 19:08:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:08:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:08:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2021-10-15 19:08:54,508 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2021-10-15 19:08:54,509 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 68 transitions. [2021-10-15 19:08:54,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 68 transitions. [2021-10-15 19:08:54,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:54,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 68 transitions. [2021-10-15 19:08:54,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:54,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:54,511 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:54,511 INFO L186 Difference]: Start difference. First operand has 42 places, 26 transitions, 133 flow. Second operand 5 states and 68 transitions. [2021-10-15 19:08:54,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 24 transitions, 155 flow [2021-10-15 19:08:54,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 24 transitions, 147 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-15 19:08:54,520 INFO L242 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2021-10-15 19:08:54,520 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2021-10-15 19:08:54,521 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 24 predicate places. [2021-10-15 19:08:54,521 INFO L470 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2021-10-15 19:08:54,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:54,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:08:54,526 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:08:54,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:08:54,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:08:54,760 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:08:54,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:08:54 BoogieIcfgContainer [2021-10-15 19:08:54,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:08:54,764 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:08:54,764 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:08:54,765 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:08:54,765 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:08:47" (3/4) ... [2021-10-15 19:08:54,769 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:08:54,782 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-15 19:08:54,782 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:08:54,783 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:08:54,783 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:08:54,826 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:08:54,831 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:08:54,833 INFO L168 Benchmark]: Toolchain (without parser) took 8361.34 ms. Allocated memory was 104.9 MB in the beginning and 127.9 MB in the end (delta: 23.1 MB). Free memory was 72.8 MB in the beginning and 62.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:54,834 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 104.9 MB. Free memory is still 60.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:08:54,835 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.53 ms. Allocated memory is still 104.9 MB. Free memory was 72.8 MB in the beginning and 80.8 MB in the end (delta: -8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:54,835 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.66 ms. Allocated memory is still 104.9 MB. Free memory was 80.3 MB in the beginning and 79.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:08:54,836 INFO L168 Benchmark]: Boogie Preprocessor took 25.71 ms. Allocated memory is still 104.9 MB. Free memory was 79.0 MB in the beginning and 77.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:54,837 INFO L168 Benchmark]: RCFGBuilder took 353.31 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 68.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:54,838 INFO L168 Benchmark]: TraceAbstraction took 7505.76 ms. Allocated memory was 104.9 MB in the beginning and 127.9 MB in the end (delta: 23.1 MB). Free memory was 67.7 MB in the beginning and 64.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:54,838 INFO L168 Benchmark]: Witness Printer took 66.74 ms. Allocated memory is still 127.9 MB. Free memory was 64.2 MB in the beginning and 62.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:54,841 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 104.9 MB. Free memory is still 60.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 345.53 ms. Allocated memory is still 104.9 MB. Free memory was 72.8 MB in the beginning and 80.8 MB in the end (delta: -8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.66 ms. Allocated memory is still 104.9 MB. Free memory was 80.3 MB in the beginning and 79.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.71 ms. Allocated memory is still 104.9 MB. Free memory was 79.0 MB in the beginning and 77.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 353.31 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 68.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7505.76 ms. Allocated memory was 104.9 MB in the beginning and 127.9 MB in the end (delta: 23.1 MB). Free memory was 67.7 MB in the beginning and 64.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.1 GB. * Witness Printer took 66.74 ms. Allocated memory is still 127.9 MB. Free memory was 64.2 MB in the beginning and 62.1 MB in the end (delta: 2.1 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: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 18]: 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, 20 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7429.2ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 3059.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 46.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20 SDtfs, 20 SDslu, 30 SDs, 0 SdLazy, 122 SolverSat, 31 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2327.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 488.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=4, InterpolantAutomatonStates: 41, 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: 63.7ms SsaConstructionTime, 223.6ms SatisfiabilityAnalysisTime, 1880.5ms InterpolantComputationTime, 122 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 470 SizeOfPredicates, 31 NumberOfNonLiveVariables, 594 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 44/76 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:08:54,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70fa1e4-577e-4c38-8a31-fef9b9937ae8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...