./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound1.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_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/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_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/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_5b9d096d-7151-4608-af1c-c373d6c8ef47/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 aafe64e6797986c8e2640a7b7069fb043af4b00a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:02:24,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:02:24,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:02:24,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:02:24,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:02:24,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:02:24,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:02:24,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:02:24,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:02:24,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:02:24,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:02:24,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:02:24,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:02:24,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:02:24,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:02:24,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:02:24,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:02:24,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:02:24,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:02:24,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:02:24,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:02:24,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:02:24,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:02:24,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:02:24,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:02:24,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:02:24,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:02:24,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:02:24,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:02:24,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:02:24,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:02:24,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:02:24,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:02:24,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:02:24,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:02:24,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:02:24,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:02:24,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:02:24,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:02:24,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:02:24,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:02:24,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:02:24,907 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:02:24,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:02:24,909 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:02:24,909 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:02:24,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:02:24,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:02:24,912 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:02:24,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:02:24,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:02:24,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:02:24,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:02:24,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:02:24,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:02:24,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:02:24,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:02:24,915 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:02:24,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:02:24,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:02:24,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:02:24,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:02:24,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:02:24,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:02:24,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:02:24,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:02:24,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:02:24,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:02:24,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:02:24,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:02:24,919 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:02:24,921 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:02:24,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:02:24,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:02:24,922 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_5b9d096d-7151-4608-af1c-c373d6c8ef47/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aafe64e6797986c8e2640a7b7069fb043af4b00a [2021-10-15 20:02:25,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:02:25,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:02:25,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:02:25,329 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:02:25,330 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:02:25,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound1.c [2021-10-15 20:02:25,419 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/data/a677b93bb/8b27a2edacf44885aeca65dca4f1e3d0/FLAGa243acaba [2021-10-15 20:02:26,087 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:02:26,087 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound1.c [2021-10-15 20:02:26,100 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/data/a677b93bb/8b27a2edacf44885aeca65dca4f1e3d0/FLAGa243acaba [2021-10-15 20:02:26,433 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/data/a677b93bb/8b27a2edacf44885aeca65dca4f1e3d0 [2021-10-15 20:02:26,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:02:26,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:02:26,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:02:26,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:02:26,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:02:26,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ef0804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26, skipping insertion in model container [2021-10-15 20:02:26,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:02:26,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:02:26,677 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_5b9d096d-7151-4608-af1c-c373d6c8ef47/sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound1.c[458,471] [2021-10-15 20:02:26,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:02:26,708 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:02:26,724 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_5b9d096d-7151-4608-af1c-c373d6c8ef47/sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound1.c[458,471] [2021-10-15 20:02:26,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:02:26,749 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:02:26,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26 WrapperNode [2021-10-15 20:02:26,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:02:26,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:02:26,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:02:26,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:02:26,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:02:26,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:02:26,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:02:26,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:02:26,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:02:26,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:02:26,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:02:26,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:02:26,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26" (1/1) ... [2021-10-15 20:02:26,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:02:26,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:26,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:02:26,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:02:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:02:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:02:26,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:02:26,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:02:27,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:02:27,167 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-15 20:02:27,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:02:27 BoogieIcfgContainer [2021-10-15 20:02:27,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:02:27,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:02:27,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:02:27,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:02:27,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:02:26" (1/3) ... [2021-10-15 20:02:27,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c56dbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:02:27, skipping insertion in model container [2021-10-15 20:02:27,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:02:26" (2/3) ... [2021-10-15 20:02:27,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c56dbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:02:27, skipping insertion in model container [2021-10-15 20:02:27,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:02:27" (3/3) ... [2021-10-15 20:02:27,179 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_unwindbound1.c [2021-10-15 20:02:27,185 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:02:27,185 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 20:02:27,247 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:02:27,256 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:02:27,257 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 20:02:27,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 20 transitions, 40 flow [2021-10-15 20:02:27,312 INFO L129 PetriNetUnfolder]: 5/20 cut-off events. [2021-10-15 20:02:27,312 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:02:27,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 20 events. 5/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:02:27,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 20 transitions, 40 flow [2021-10-15 20:02:27,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 12 places, 15 transitions, 30 flow [2021-10-15 20:02:27,326 INFO L129 PetriNetUnfolder]: 4/13 cut-off events. [2021-10-15 20:02:27,327 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:02:27,327 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:27,328 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 20:02:27,345 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:02:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:27,352 INFO L82 PathProgramCache]: Analyzing trace with hash 890245543, now seen corresponding path program 1 times [2021-10-15 20:02:27,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:27,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843184193] [2021-10-15 20:02:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:27,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:27,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:27,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843184193] [2021-10-15 20:02:27,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843184193] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:27,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:27,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:02:27,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125684823] [2021-10-15 20:02:27,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:02:27,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:27,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:02:27,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:02:27,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 20 [2021-10-15 20:02:27,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 15 transitions, 30 flow. Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:27,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:27,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 20 [2021-10-15 20:02:27,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:27,689 INFO L129 PetriNetUnfolder]: 2/13 cut-off events. [2021-10-15 20:02:27,690 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:02:27,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 13 events. 2/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2021-10-15 20:02:27,694 INFO L132 encePairwiseOnDemand]: 18/20 looper letters, 0 selfloop transitions, 0 changer transitions 0/13 dead transitions. [2021-10-15 20:02:27,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 13 transitions, 26 flow [2021-10-15 20:02:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:02:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:02:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2021-10-15 20:02:27,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9 [2021-10-15 20:02:27,712 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 36 transitions. [2021-10-15 20:02:27,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 36 transitions. [2021-10-15 20:02:27,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:27,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 36 transitions. [2021-10-15 20:02:27,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:27,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:27,724 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:27,726 INFO L186 Difference]: Start difference. First operand has 12 places, 15 transitions, 30 flow. Second operand 2 states and 36 transitions. [2021-10-15 20:02:27,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 13 transitions, 26 flow [2021-10-15 20:02:27,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 13 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:02:27,733 INFO L242 Difference]: Finished difference. Result has 13 places, 13 transitions, 26 flow [2021-10-15 20:02:27,735 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=26, PETRI_PLACES=13, PETRI_TRANSITIONS=13} [2021-10-15 20:02:27,736 INFO L334 CegarLoopForPetriNet]: 12 programPoint places, 1 predicate places. [2021-10-15 20:02:27,738 INFO L470 AbstractCegarLoop]: Abstraction has has 13 places, 13 transitions, 26 flow [2021-10-15 20:02:27,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:27,738 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:27,739 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 20:02:27,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:02:27,740 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:02:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-15 20:02:27,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:27,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279709888] [2021-10-15 20:02:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:27,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:27,785 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:02:27,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436389008] [2021-10-15 20:02:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:27,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:27,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:27,790 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:02:27,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:02:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:27,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:02:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:02:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:28,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:28,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279709888] [2021-10-15 20:02:28,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:02:28,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436389008] [2021-10-15 20:02:28,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436389008] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:28,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:28,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:02:28,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887985737] [2021-10-15 20:02:28,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:02:28,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:28,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:02:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:02:28,139 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 20 [2021-10-15 20:02:28,139 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 13 transitions, 26 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:28,139 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 20 [2021-10-15 20:02:28,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:28,226 INFO L129 PetriNetUnfolder]: 4/25 cut-off events. [2021-10-15 20:02:28,230 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:02:28,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 25 events. 4/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 39. Up to 9 conditions per place. [2021-10-15 20:02:28,231 INFO L132 encePairwiseOnDemand]: 14/20 looper letters, 7 selfloop transitions, 5 changer transitions 2/20 dead transitions. [2021-10-15 20:02:28,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 20 transitions, 68 flow [2021-10-15 20:02:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:02:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:02:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2021-10-15 20:02:28,236 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.61 [2021-10-15 20:02:28,236 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 61 transitions. [2021-10-15 20:02:28,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 61 transitions. [2021-10-15 20:02:28,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:28,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 61 transitions. [2021-10-15 20:02:28,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,245 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,245 INFO L186 Difference]: Start difference. First operand has 13 places, 13 transitions, 26 flow. Second operand 5 states and 61 transitions. [2021-10-15 20:02:28,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 20 transitions, 68 flow [2021-10-15 20:02:28,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 20 transitions, 68 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:02:28,248 INFO L242 Difference]: Finished difference. Result has 20 places, 17 transitions, 63 flow [2021-10-15 20:02:28,249 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=63, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2021-10-15 20:02:28,249 INFO L334 CegarLoopForPetriNet]: 12 programPoint places, 8 predicate places. [2021-10-15 20:02:28,250 INFO L470 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 63 flow [2021-10-15 20:02:28,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,250 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:28,250 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:28,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:02:28,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:28,473 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:02:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2021-10-15 20:02:28,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:28,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289335568] [2021-10-15 20:02:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:28,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:28,497 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:02:28,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599443350] [2021-10-15 20:02:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:28,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:28,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:28,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:02:28,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:02:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:02:28,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:02:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:28,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:28,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289335568] [2021-10-15 20:02:28,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:02:28,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599443350] [2021-10-15 20:02:28,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599443350] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:28,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:02:28,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-15 20:02:28,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526685358] [2021-10-15 20:02:28,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:02:28,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:28,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:02:28,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:02:28,661 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 20 [2021-10-15 20:02:28,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:28,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 20 [2021-10-15 20:02:28,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:28,704 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-10-15 20:02:28,705 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 20:02:28,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 14 events. 0/14 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-10-15 20:02:28,707 INFO L132 encePairwiseOnDemand]: 16/20 looper letters, 2 selfloop transitions, 4 changer transitions 3/14 dead transitions. [2021-10-15 20:02:28,707 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 62 flow [2021-10-15 20:02:28,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:02:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:02:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2021-10-15 20:02:28,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.68 [2021-10-15 20:02:28,711 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 68 transitions. [2021-10-15 20:02:28,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 68 transitions. [2021-10-15 20:02:28,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:28,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 68 transitions. [2021-10-15 20:02:28,716 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 20:02:28,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,717 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,717 INFO L186 Difference]: Start difference. First operand has 20 places, 17 transitions, 63 flow. Second operand 5 states and 68 transitions. [2021-10-15 20:02:28,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 62 flow [2021-10-15 20:02:28,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 14 transitions, 58 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:02:28,720 INFO L242 Difference]: Finished difference. Result has 20 places, 11 transitions, 42 flow [2021-10-15 20:02:28,720 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=42, PETRI_PLACES=20, PETRI_TRANSITIONS=11} [2021-10-15 20:02:28,721 INFO L334 CegarLoopForPetriNet]: 12 programPoint places, 8 predicate places. [2021-10-15 20:02:28,721 INFO L470 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 42 flow [2021-10-15 20:02:28,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,721 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:28,721 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:28,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:02:28,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:28,929 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:02:28,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:28,930 INFO L82 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2021-10-15 20:02:28,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:28,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484969124] [2021-10-15 20:02:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:28,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:28,943 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:02:28,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760820783] [2021-10-15 20:02:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:28,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:28,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:28,945 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:02:28,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:02:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:02:29,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:02:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:29,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:29,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484969124] [2021-10-15 20:02:29,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:02:29,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760820783] [2021-10-15 20:02:29,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760820783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:29,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:02:29,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 20:02:29,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23331858] [2021-10-15 20:02:29,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:02:29,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:29,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:02:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:02:29,193 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 20 [2021-10-15 20:02:29,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 11 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:29,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:29,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 20 [2021-10-15 20:02:29,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:29,225 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-10-15 20:02:29,226 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 20:02:29,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 9 events. 0/9 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 20:02:29,226 INFO L132 encePairwiseOnDemand]: 16/20 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2021-10-15 20:02:29,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 9 transitions, 46 flow [2021-10-15 20:02:29,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:02:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:02:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2021-10-15 20:02:29,228 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.51 [2021-10-15 20:02:29,228 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 51 transitions. [2021-10-15 20:02:29,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 51 transitions. [2021-10-15 20:02:29,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:29,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 51 transitions. [2021-10-15 20:02:29,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:29,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:29,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:29,231 INFO L186 Difference]: Start difference. First operand has 20 places, 11 transitions, 42 flow. Second operand 5 states and 51 transitions. [2021-10-15 20:02:29,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 9 transitions, 46 flow [2021-10-15 20:02:29,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 9 transitions, 37 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-10-15 20:02:29,233 INFO L242 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2021-10-15 20:02:29,233 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2021-10-15 20:02:29,233 INFO L334 CegarLoopForPetriNet]: 12 programPoint places, 5 predicate places. [2021-10-15 20:02:29,233 INFO L470 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2021-10-15 20:02:29,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:29,236 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:02:29,237 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:02:29,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-15 20:02:29,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:29,453 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:02:29,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:02:29 BoogieIcfgContainer [2021-10-15 20:02:29,457 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:02:29,458 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:02:29,458 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:02:29,458 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:02:29,459 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:02:27" (3/4) ... [2021-10-15 20:02:29,462 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:02:29,478 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-15 20:02:29,479 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:02:29,479 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:02:29,479 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:02:29,531 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:02:29,532 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:02:29,533 INFO L168 Benchmark]: Toolchain (without parser) took 3094.11 ms. Allocated memory was 115.3 MB in the beginning and 157.3 MB in the end (delta: 41.9 MB). Free memory was 84.8 MB in the beginning and 92.9 MB in the end (delta: -8.1 MB). Peak memory consumption was 32.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:02:29,534 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 115.3 MB. Free memory was 68.6 MB in the beginning and 68.6 MB in the end (delta: 56.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:02:29,535 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.94 ms. Allocated memory is still 115.3 MB. Free memory was 84.8 MB in the beginning and 89.2 MB in the end (delta: -4.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:02:29,535 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.05 ms. Allocated memory is still 115.3 MB. Free memory was 89.2 MB in the beginning and 87.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:02:29,536 INFO L168 Benchmark]: Boogie Preprocessor took 25.50 ms. Allocated memory is still 115.3 MB. Free memory was 87.7 MB in the beginning and 86.8 MB in the end (delta: 870.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:02:29,536 INFO L168 Benchmark]: RCFGBuilder took 345.99 ms. Allocated memory is still 115.3 MB. Free memory was 86.8 MB in the beginning and 77.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:02:29,537 INFO L168 Benchmark]: TraceAbstraction took 2286.42 ms. Allocated memory was 115.3 MB in the beginning and 157.3 MB in the end (delta: 41.9 MB). Free memory was 76.9 MB in the beginning and 95.7 MB in the end (delta: -18.8 MB). Peak memory consumption was 25.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:02:29,537 INFO L168 Benchmark]: Witness Printer took 73.75 ms. Allocated memory is still 157.3 MB. Free memory was 95.7 MB in the beginning and 92.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:02:29,541 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 115.3 MB. Free memory was 68.6 MB in the beginning and 68.6 MB in the end (delta: 56.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 305.94 ms. Allocated memory is still 115.3 MB. Free memory was 84.8 MB in the beginning and 89.2 MB in the end (delta: -4.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.05 ms. Allocated memory is still 115.3 MB. Free memory was 89.2 MB in the beginning and 87.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.50 ms. Allocated memory is still 115.3 MB. Free memory was 87.7 MB in the beginning and 86.8 MB in the end (delta: 870.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 345.99 ms. Allocated memory is still 115.3 MB. Free memory was 86.8 MB in the beginning and 77.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2286.42 ms. Allocated memory was 115.3 MB in the beginning and 157.3 MB in the end (delta: 41.9 MB). Free memory was 76.9 MB in the beginning and 95.7 MB in the end (delta: -18.8 MB). Peak memory consumption was 25.3 MB. Max. memory is 16.1 GB. * Witness Printer took 73.75 ms. Allocated memory is still 157.3 MB. Free memory was 95.7 MB in the beginning and 92.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2213.1ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 298.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 64.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9 SDtfs, 7 SDslu, 8 SDs, 0 SdLazy, 31 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=2, InterpolantAutomatonStates: 17, 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: 29.4ms SsaConstructionTime, 121.4ms SatisfiabilityAnalysisTime, 488.6ms InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 107 SizeOfPredicates, 7 NumberOfNonLiveVariables, 199 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/5 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 20:02:29,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b9d096d-7151-4608-af1c-c373d6c8ef47/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...