./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a --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 4615816b63186e8ef25ffa56a09fb574b90534edb7a787dbb36e36eb2c34dee2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 13:50:45,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:50:45,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:50:45,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:50:45,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:50:45,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:50:45,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:50:45,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:50:45,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:50:45,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:50:45,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:50:45,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:50:45,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:50:45,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:50:45,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:50:45,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:50:45,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:50:45,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:50:45,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:50:45,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:50:45,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:50:45,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:50:45,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:50:45,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:50:45,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:50:45,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:50:45,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:50:45,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:50:45,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:50:45,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:50:45,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:50:45,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:50:45,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:50:45,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:50:45,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:50:45,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:50:45,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:50:45,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:50:45,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:50:45,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:50:45,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:50:45,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 13:50:45,838 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:50:45,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:50:45,839 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:50:45,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:50:45,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:50:45,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:50:45,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:50:45,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:50:45,841 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:50:45,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:50:45,841 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:50:45,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:50:45,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:50:45,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:50:45,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:50:45,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:50:45,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:50:45,847 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:50:45,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:50:45,848 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:50:45,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:50:45,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:50:45,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:50:45,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:50:45,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:50:45,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:50:45,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:50:45,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:50:45,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:50:45,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:50:45,852 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:50:45,852 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:50:45,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:50:45,853 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_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4615816b63186e8ef25ffa56a09fb574b90534edb7a787dbb36e36eb2c34dee2 [2022-11-21 13:50:46,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:50:46,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:50:46,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:50:46,112 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:50:46,113 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:50:46,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2022-11-21 13:50:49,207 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:50:49,402 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:50:49,403 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2022-11-21 13:50:49,409 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/data/ca881b8c5/17818733de2349ef8eda85c206962bc0/FLAGcd63c283f [2022-11-21 13:50:49,424 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/data/ca881b8c5/17818733de2349ef8eda85c206962bc0 [2022-11-21 13:50:49,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:50:49,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:50:49,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:50:49,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:50:49,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:50:49,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283d6e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49, skipping insertion in model container [2022-11-21 13:50:49,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:50:49,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:50:49,626 WARN L237 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_ca03c541-a96b-4e20-bf20-ce548c812170/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2022-11-21 13:50:49,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:50:49,652 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:50:49,664 WARN L237 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_ca03c541-a96b-4e20-bf20-ce548c812170/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2022-11-21 13:50:49,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:50:49,681 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:50:49,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49 WrapperNode [2022-11-21 13:50:49,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:50:49,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:50:49,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:50:49,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:50:49,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,711 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-21 13:50:49,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:50:49,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:50:49,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:50:49,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:50:49,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,728 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:50:49,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:50:49,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:50:49,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:50:49,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (1/1) ... [2022-11-21 13:50:49,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:50:49,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:50:49,772 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:50:49,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:50:49,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:50:49,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:50:49,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:50:49,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:50:49,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-21 13:50:49,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-21 13:50:49,878 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:50:49,880 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:50:50,009 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:50:50,015 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:50:50,016 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 13:50:50,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:50:50 BoogieIcfgContainer [2022-11-21 13:50:50,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:50:50,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:50:50,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:50:50,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:50:50,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:50:49" (1/3) ... [2022-11-21 13:50:50,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29db80c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:50:50, skipping insertion in model container [2022-11-21 13:50:50,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:49" (2/3) ... [2022-11-21 13:50:50,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29db80c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:50:50, skipping insertion in model container [2022-11-21 13:50:50,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:50:50" (3/3) ... [2022-11-21 13:50:50,027 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.c [2022-11-21 13:50:50,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:50:50,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 13:50:50,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:50:50,103 INFO L357 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, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@20e1ed31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:50:50,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 13:50:50,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 13:50:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 13:50:50,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:50:50,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:50:50,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:50:50,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:50:50,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2022-11-21 13:50:50,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:50:50,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015495420] [2022-11-21 13:50:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:50,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:50:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:50:50,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:50:50,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015495420] [2022-11-21 13:50:50,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015495420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:50:50,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:50:50,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:50:50,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045871111] [2022-11-21 13:50:50,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:50:50,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:50:50,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:50:50,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:50:50,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:50:50,306 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:50:50,327 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2022-11-21 13:50:50,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:50:50,329 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-21 13:50:50,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:50:50,336 INFO L225 Difference]: With dead ends: 40 [2022-11-21 13:50:50,337 INFO L226 Difference]: Without dead ends: 17 [2022-11-21 13:50:50,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:50:50,343 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:50:50,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:50:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-21 13:50:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-21 13:50:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 13:50:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-11-21 13:50:50,387 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2022-11-21 13:50:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:50:50,387 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-11-21 13:50:50,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-11-21 13:50:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 13:50:50,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:50:50,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:50:50,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:50:50,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:50:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:50:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2022-11-21 13:50:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:50:50,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170070133] [2022-11-21 13:50:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:50,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:50:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:50:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:50:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170070133] [2022-11-21 13:50:50,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170070133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:50:50,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:50:50,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:50:50,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013686504] [2022-11-21 13:50:50,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:50:50,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:50:50,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:50:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:50:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:50:50,562 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:50:50,582 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-11-21 13:50:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:50:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 13:50:50,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:50:50,584 INFO L225 Difference]: With dead ends: 28 [2022-11-21 13:50:50,584 INFO L226 Difference]: Without dead ends: 19 [2022-11-21 13:50:50,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:50:50,586 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:50:50,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:50:50,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-21 13:50:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-21 13:50:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 13:50:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-21 13:50:50,593 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2022-11-21 13:50:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:50:50,594 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-21 13:50:50,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:50,594 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-21 13:50:50,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 13:50:50,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:50:50,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:50:50,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:50:50,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:50:50,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:50:50,596 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2022-11-21 13:50:50,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:50:50,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213959845] [2022-11-21 13:50:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:50,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:50:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:50:50,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:50:50,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213959845] [2022-11-21 13:50:50,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213959845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:50:50,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:50:50,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:50:50,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2842499] [2022-11-21 13:50:50,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:50:50,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:50:50,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:50:50,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:50:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:50:50,739 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:50:50,853 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-11-21 13:50:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:50:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 13:50:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:50:50,855 INFO L225 Difference]: With dead ends: 32 [2022-11-21 13:50:50,855 INFO L226 Difference]: Without dead ends: 30 [2022-11-21 13:50:50,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:50:50,856 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:50:50,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 69 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:50:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-21 13:50:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-21 13:50:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 13:50:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-11-21 13:50:50,871 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2022-11-21 13:50:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:50:50,871 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-11-21 13:50:50,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:50,872 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-11-21 13:50:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 13:50:50,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:50:50,873 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:50:50,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 13:50:50,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:50:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:50:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2022-11-21 13:50:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:50:50,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757316941] [2022-11-21 13:50:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:50,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:50:50,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:50:50,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356563407] [2022-11-21 13:50:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:50,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:50:50,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:50:50,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:50:50,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:50:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:50,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 13:50:50,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:50:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:50:51,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:50:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:50:51,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:50:51,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757316941] [2022-11-21 13:50:51,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:50:51,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356563407] [2022-11-21 13:50:51,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356563407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:50:51,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:50:51,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-21 13:50:51,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961330586] [2022-11-21 13:50:51,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:50:51,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:50:51,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:50:51,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:50:51,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:50:51,307 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 13:50:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:50:51,479 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2022-11-21 13:50:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:50:51,480 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2022-11-21 13:50:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:50:51,482 INFO L225 Difference]: With dead ends: 40 [2022-11-21 13:50:51,482 INFO L226 Difference]: Without dead ends: 35 [2022-11-21 13:50:51,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:50:51,484 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:50:51,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:50:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-21 13:50:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-11-21 13:50:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 13:50:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-21 13:50:51,497 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2022-11-21 13:50:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:50:51,497 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-21 13:50:51,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 13:50:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-21 13:50:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 13:50:51,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:50:51,499 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:50:51,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 13:50:51,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:50:51,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:50:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:50:51,706 INFO L85 PathProgramCache]: Analyzing trace with hash 259746456, now seen corresponding path program 1 times [2022-11-21 13:50:51,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:50:51,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753963487] [2022-11-21 13:50:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:50:51,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:50:51,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572353559] [2022-11-21 13:50:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:51,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:50:51,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:50:51,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:50:51,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:50:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:50:51,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:50:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 13:50:51,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:50:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 13:50:51,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:50:51,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753963487] [2022-11-21 13:50:51,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:50:51,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572353559] [2022-11-21 13:50:51,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572353559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:50:51,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:50:51,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-21 13:50:51,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209826659] [2022-11-21 13:50:51,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:50:51,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 13:50:51,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:50:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 13:50:51,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:50:51,894 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-21 13:50:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:50:52,052 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2022-11-21 13:50:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 13:50:52,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2022-11-21 13:50:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:50:52,058 INFO L225 Difference]: With dead ends: 88 [2022-11-21 13:50:52,058 INFO L226 Difference]: Without dead ends: 75 [2022-11-21 13:50:52,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:50:52,062 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:50:52,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 150 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:50:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-21 13:50:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-11-21 13:50:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-21 13:50:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-11-21 13:50:52,106 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 26 [2022-11-21 13:50:52,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:50:52,106 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-11-21 13:50:52,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-21 13:50:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-11-21 13:50:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 13:50:52,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:50:52,108 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:50:52,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:50:52,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:50:52,314 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:50:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:50:52,315 INFO L85 PathProgramCache]: Analyzing trace with hash 261414752, now seen corresponding path program 1 times [2022-11-21 13:50:52,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:50:52,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088347168] [2022-11-21 13:50:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:52,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:50:52,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:50:52,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125902482] [2022-11-21 13:50:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:52,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:50:52,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:50:52,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:50:52,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:50:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:52,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 13:50:52,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:50:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 13:50:52,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:50:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 13:50:52,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:50:52,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088347168] [2022-11-21 13:50:52,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:50:52,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125902482] [2022-11-21 13:50:52,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125902482] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 13:50:52,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:50:52,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-21 13:50:52,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745413955] [2022-11-21 13:50:52,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:50:52,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:50:52,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:50:52,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:50:52,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:50:52,527 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 13:50:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:50:52,590 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2022-11-21 13:50:52,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:50:52,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-11-21 13:50:52,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:50:52,591 INFO L225 Difference]: With dead ends: 85 [2022-11-21 13:50:52,592 INFO L226 Difference]: Without dead ends: 83 [2022-11-21 13:50:52,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:50:52,593 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:50:52,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:50:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-21 13:50:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-21 13:50:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.14) internal successors, (57), 53 states have internal predecessors, (57), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-21 13:50:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-11-21 13:50:52,610 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 26 [2022-11-21 13:50:52,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:50:52,626 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-11-21 13:50:52,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 13:50:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-11-21 13:50:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-21 13:50:52,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:50:52,628 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-21 13:50:52,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:50:52,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 13:50:52,852 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:50:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:50:52,852 INFO L85 PathProgramCache]: Analyzing trace with hash 854826784, now seen corresponding path program 2 times [2022-11-21 13:50:52,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:50:52,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078964977] [2022-11-21 13:50:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:52,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:50:52,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:50:52,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013069014] [2022-11-21 13:50:52,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:50:52,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:50:52,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:50:52,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:50:52,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:50:52,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:50:52,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:50:52,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 13:50:52,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:50:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 13:50:53,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:50:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-21 13:50:53,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:50:53,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078964977] [2022-11-21 13:50:53,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:50:53,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013069014] [2022-11-21 13:50:53,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013069014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:50:53,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:50:53,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-21 13:50:53,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368497152] [2022-11-21 13:50:53,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:50:53,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:50:53,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:50:53,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:50:53,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:50:53,328 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-21 13:50:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:50:53,725 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-11-21 13:50:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:50:53,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2022-11-21 13:50:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:50:53,727 INFO L225 Difference]: With dead ends: 83 [2022-11-21 13:50:53,727 INFO L226 Difference]: Without dead ends: 0 [2022-11-21 13:50:53,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:50:53,730 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:50:53,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 75 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:50:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-21 13:50:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-21 13:50:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-11-21 13:50:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-21 13:50:53,738 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2022-11-21 13:50:53,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:50:53,739 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-21 13:50:53,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-21 13:50:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-21 13:50:53,739 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-21 13:50:53,742 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-21 13:50:53,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:50:53,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 13:50:53,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-21 13:50:54,712 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-11-21 13:50:54,713 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-21 13:50:54,713 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-21 13:50:54,713 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-21 13:50:54,713 INFO L902 garLoopResultBuilder]: At program point L48(lines 21 49) the Hoare annotation is: true [2022-11-21 13:50:54,714 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-11-21 13:50:54,714 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-21 13:50:54,714 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-21 13:50:54,714 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-21 13:50:54,714 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-21 13:50:54,714 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-11-21 13:50:54,714 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-21 13:50:54,715 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-21 13:50:54,715 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-21 13:50:54,715 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-21 13:50:54,715 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-11-21 13:50:54,715 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-11-21 13:50:54,715 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-11-21 13:50:54,715 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-11-21 13:50:54,716 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-11-21 13:50:54,716 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-11-21 13:50:54,725 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2022-11-21 13:50:54,728 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-21 13:50:54,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:50:54 BoogieIcfgContainer [2022-11-21 13:50:54,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-21 13:50:54,746 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 13:50:54,747 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 13:50:54,747 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 13:50:54,747 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:50:50" (3/4) ... [2022-11-21 13:50:54,750 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-21 13:50:54,756 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-21 13:50:54,761 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-21 13:50:54,761 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-21 13:50:54,762 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-21 13:50:54,762 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-21 13:50:54,797 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 13:50:54,797 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 13:50:54,798 INFO L158 Benchmark]: Toolchain (without parser) took 5370.55ms. Allocated memory is still 190.8MB. Free memory was 153.6MB in the beginning and 153.7MB in the end (delta: -88.4kB). Peak memory consumption was 931.3kB. Max. memory is 16.1GB. [2022-11-21 13:50:54,798 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 130.0MB. Free memory is still 74.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:50:54,798 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.32ms. Allocated memory is still 190.8MB. Free memory was 153.1MB in the beginning and 142.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 13:50:54,799 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.27ms. Allocated memory is still 190.8MB. Free memory was 142.6MB in the beginning and 141.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:50:54,799 INFO L158 Benchmark]: Boogie Preprocessor took 18.29ms. Allocated memory is still 190.8MB. Free memory was 141.5MB in the beginning and 140.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:50:54,799 INFO L158 Benchmark]: RCFGBuilder took 287.23ms. Allocated memory is still 190.8MB. Free memory was 140.4MB in the beginning and 130.0MB in the end (delta: 10.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 13:50:54,800 INFO L158 Benchmark]: TraceAbstraction took 4725.73ms. Allocated memory is still 190.8MB. Free memory was 129.0MB in the beginning and 155.8MB in the end (delta: -26.8MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. [2022-11-21 13:50:54,800 INFO L158 Benchmark]: Witness Printer took 51.08ms. Allocated memory is still 190.8MB. Free memory was 155.8MB in the beginning and 153.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 13:50:54,802 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 130.0MB. Free memory is still 74.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 253.32ms. Allocated memory is still 190.8MB. Free memory was 153.1MB in the beginning and 142.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.27ms. Allocated memory is still 190.8MB. Free memory was 142.6MB in the beginning and 141.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.29ms. Allocated memory is still 190.8MB. Free memory was 141.5MB in the beginning and 140.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 287.23ms. Allocated memory is still 190.8MB. Free memory was 140.4MB in the beginning and 130.0MB in the end (delta: 10.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4725.73ms. Allocated memory is still 190.8MB. Free memory was 129.0MB in the beginning and 155.8MB in the end (delta: -26.8MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. * Witness Printer took 51.08ms. Allocated memory is still 190.8MB. Free memory was 155.8MB in the beginning and 153.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: 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 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.6s, OverallIterations: 7, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 100 mSDsluCounter, 467 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 312 mSDsCounter, 63 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 465 IncrementalHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 63 mSolverCounterUnsat, 155 mSDtfsCounter, 465 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 213 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 44 PreInvPairs, 74 NumberOfFragments, 142 HoareAnnotationTreeSize, 44 FomulaSimplifications, 102 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 785 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 842 SizeOfPredicates, 8 NumberOfNonLiveVariables, 340 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 156/196 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: t == 1 + 2 * a && s * 4 == t * t + 2 * t + 1 RESULT: Ultimate proved your program to be correct! [2022-11-21 13:50:54,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca03c541-a96b-4e20-bf20-ce548c812170/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE