./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN --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 4030584521f36b8dc597e2fe097d1241b197ec784cb344ca35f6903bd5f84f17 --- 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-6b4ec56 [2022-11-20 11:21:49,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:21:49,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:21:49,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:21:49,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:21:49,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:21:49,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:21:49,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:21:49,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:21:49,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:21:49,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:21:49,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:21:49,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:21:49,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:21:49,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:21:49,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:21:49,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:21:49,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:21:49,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:21:49,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:21:49,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:21:49,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:21:49,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:21:49,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:21:49,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:21:49,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:21:49,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:21:49,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:21:49,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:21:49,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:21:49,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:21:49,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:21:49,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:21:49,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:21:49,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:21:49,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:21:49,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:21:49,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:21:49,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:21:49,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:21:49,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:21:49,997 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:21:50,046 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:21:50,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:21:50,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:21:50,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:21:50,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:21:50,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:21:50,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:21:50,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:21:50,055 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:21:50,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:21:50,057 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:21:50,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:21:50,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:21:50,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:21:50,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:21:50,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:21:50,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:21:50,072 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:21:50,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:21:50,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:21:50,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:21:50,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:21:50,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:21:50,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:21:50,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:21:50,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:21:50,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:21:50,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:21:50,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:21:50,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:21:50,077 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:21:50,077 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:21:50,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:21:50,078 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_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4030584521f36b8dc597e2fe097d1241b197ec784cb344ca35f6903bd5f84f17 [2022-11-20 11:21:50,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:21:50,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:21:50,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:21:50,422 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:21:50,422 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:21:50,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2022-11-20 11:21:53,780 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:21:54,122 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:21:54,123 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2022-11-20 11:21:54,132 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/data/cc668ea59/e1181f9d1a0f46b8ba4778677fd0aeb1/FLAGea6021f28 [2022-11-20 11:21:54,156 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/data/cc668ea59/e1181f9d1a0f46b8ba4778677fd0aeb1 [2022-11-20 11:21:54,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:21:54,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:21:54,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:21:54,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:21:54,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:21:54,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@592edb0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54, skipping insertion in model container [2022-11-20 11:21:54,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:21:54,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:21:54,378 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_678d03b4-8d50-4974-8da4-7962de1904e9/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c[535,548] [2022-11-20 11:21:54,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:21:54,413 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:21:54,425 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_678d03b4-8d50-4974-8da4-7962de1904e9/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c[535,548] [2022-11-20 11:21:54,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:21:54,451 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:21:54,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54 WrapperNode [2022-11-20 11:21:54,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:21:54,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:21:54,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:21:54,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:21:54,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,489 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-20 11:21:54,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:21:54,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:21:54,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:21:54,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:21:54,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,514 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:21:54,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:21:54,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:21:54,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:21:54,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (1/1) ... [2022-11-20 11:21:54,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:21:54,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:54,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:21:54,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:21:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:21:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 11:21:54,614 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 11:21:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:21:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:21:54,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:21:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 11:21:54,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 11:21:54,688 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:21:54,691 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:21:54,916 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:21:54,934 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:21:54,935 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:21:54,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:21:54 BoogieIcfgContainer [2022-11-20 11:21:54,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:21:54,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:21:54,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:21:54,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:21:54,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:21:54" (1/3) ... [2022-11-20 11:21:54,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211814ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:21:54, skipping insertion in model container [2022-11-20 11:21:54,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:54" (2/3) ... [2022-11-20 11:21:54,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211814ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:21:54, skipping insertion in model container [2022-11-20 11:21:54,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:21:54" (3/3) ... [2022-11-20 11:21:54,956 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound10.c [2022-11-20 11:21:54,984 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:21:54,984 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:21:55,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:21:55,096 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;@7eb07780, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:21:55,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:21:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:21:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:21:55,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:55,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:55,114 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:55,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:55,123 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2022-11-20 11:21:55,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:55,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016443624] [2022-11-20 11:21:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:55,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:55,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:21:55,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762976709] [2022-11-20 11:21:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:55,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:55,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:55,303 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:55,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:21:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:55,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 11:21:55,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:21:55,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:55,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:55,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016443624] [2022-11-20 11:21:55,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:21:55,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762976709] [2022-11-20 11:21:55,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762976709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:55,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:55,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:21:55,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539669695] [2022-11-20 11:21:55,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:55,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:21:55,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:55,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:21:55,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:21:55,554 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:21:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:55,598 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2022-11-20 11:21:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:21:55,605 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-20 11:21:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:55,615 INFO L225 Difference]: With dead ends: 61 [2022-11-20 11:21:55,616 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 11:21:55,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:21:55,629 INFO L413 NwaCegarLoop]: 41 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, 41 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 [2022-11-20 11:21:55,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:21:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 11:21:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-20 11:21:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:21:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-11-20 11:21:55,691 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2022-11-20 11:21:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:55,691 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-11-20 11:21:55,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:21:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-11-20 11:21:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:21:55,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:55,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:55,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:21:55,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 11:21:55,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:55,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2022-11-20 11:21:55,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:55,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13842016] [2022-11-20 11:21:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:55,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:55,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:21:55,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992980847] [2022-11-20 11:21:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:55,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:55,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:55,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:21:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:56,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:21:56,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:21:56,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:56,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:56,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13842016] [2022-11-20 11:21:56,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:21:56,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992980847] [2022-11-20 11:21:56,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992980847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:56,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:56,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:21:56,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452136065] [2022-11-20 11:21:56,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:56,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:21:56,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:56,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:21:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:21:56,182 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:21:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:56,239 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-11-20 11:21:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:21:56,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-20 11:21:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:56,244 INFO L225 Difference]: With dead ends: 37 [2022-11-20 11:21:56,245 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 11:21:56,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:21:56,247 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:56,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:21:56,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 11:21:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-20 11:21:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:21:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-11-20 11:21:56,300 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2022-11-20 11:21:56,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:56,302 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-11-20 11:21:56,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:21:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-11-20 11:21:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:21:56,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:56,304 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:56,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 11:21:56,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:56,523 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2022-11-20 11:21:56,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:56,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994713510] [2022-11-20 11:21:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:56,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:56,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:21:56,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032694239] [2022-11-20 11:21:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:56,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:56,555 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:56,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:21:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:56,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:21:56,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:21:56,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:56,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:56,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994713510] [2022-11-20 11:21:56,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:21:56,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032694239] [2022-11-20 11:21:56,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032694239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:56,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:56,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:21:56,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088610447] [2022-11-20 11:21:56,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:56,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:21:56,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:56,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:21:56,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:21:56,955 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:21:58,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 11:22:03,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 11:22:04,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 11:22:06,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 11:22:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:06,204 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-11-20 11:22:06,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:22:06,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-20 11:22:06,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:06,206 INFO L225 Difference]: With dead ends: 49 [2022-11-20 11:22:06,206 INFO L226 Difference]: Without dead ends: 47 [2022-11-20 11:22:06,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:22:06,208 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:06,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 122 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-11-20 11:22:06,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-20 11:22:06,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-11-20 11:22:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 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) [2022-11-20 11:22:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-11-20 11:22:06,237 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2022-11-20 11:22:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:06,238 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-11-20 11:22:06,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:22:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-11-20 11:22:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 11:22:06,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:06,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:06,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:06,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:06,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:06,444 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2022-11-20 11:22:06,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:06,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314227992] [2022-11-20 11:22:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:06,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:06,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:22:06,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611991895] [2022-11-20 11:22:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:06,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:06,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:06,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:06,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:22:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:22:06,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:22:06,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:22:06,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:06,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314227992] [2022-11-20 11:22:06,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:22:06,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611991895] [2022-11-20 11:22:06,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611991895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:06,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:06,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-11-20 11:22:06,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800570130] [2022-11-20 11:22:06,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:06,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:22:06,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:06,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:22:06,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:22:06,843 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 11:22:07,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:07,205 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-11-20 11:22:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:22:07,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-11-20 11:22:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:07,215 INFO L225 Difference]: With dead ends: 53 [2022-11-20 11:22:07,215 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 11:22:07,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:22:07,219 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:07,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 139 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:22:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 11:22:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2022-11-20 11:22:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:22:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-20 11:22:07,243 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2022-11-20 11:22:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:07,243 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-20 11:22:07,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 11:22:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-20 11:22:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:22:07,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:07,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:07,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:07,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:07,452 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2022-11-20 11:22:07,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:07,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531733543] [2022-11-20 11:22:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:07,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:07,468 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:22:07,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212498706] [2022-11-20 11:22:07,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:07,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:07,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:07,471 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:07,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:22:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:07,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:22:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:22:07,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:07,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:07,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531733543] [2022-11-20 11:22:07,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:22:07,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212498706] [2022-11-20 11:22:07,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212498706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:07,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:07,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:22:07,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659492056] [2022-11-20 11:22:07,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:07,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:22:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:07,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:22:07,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:22:07,638 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:22:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:07,701 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-11-20 11:22:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:22:07,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-11-20 11:22:07,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:07,703 INFO L225 Difference]: With dead ends: 61 [2022-11-20 11:22:07,703 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 11:22:07,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:22:07,705 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:07,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 109 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:22:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 11:22:07,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-20 11:22:07,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:22:07,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-11-20 11:22:07,732 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2022-11-20 11:22:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:07,733 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-11-20 11:22:07,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:22:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-11-20 11:22:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:22:07,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:07,735 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:07,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 11:22:07,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:07,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:07,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:07,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2022-11-20 11:22:07,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:07,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496697507] [2022-11-20 11:22:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:07,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:07,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:22:07,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324408021] [2022-11-20 11:22:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:07,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:07,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:07,978 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:08,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:22:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:08,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:22:08,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:22:08,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:22:08,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:08,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496697507] [2022-11-20 11:22:08,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:22:08,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324408021] [2022-11-20 11:22:08,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324408021] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:22:08,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:22:08,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-11-20 11:22:08,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087038124] [2022-11-20 11:22:08,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:08,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:22:08,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:22:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:22:08,250 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 11:22:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:08,340 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-11-20 11:22:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:22:08,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-11-20 11:22:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:08,346 INFO L225 Difference]: With dead ends: 70 [2022-11-20 11:22:08,346 INFO L226 Difference]: Without dead ends: 49 [2022-11-20 11:22:08,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:22:08,349 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 23 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:08,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 114 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:22:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-20 11:22:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-11-20 11:22:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 11:22:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-20 11:22:08,392 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2022-11-20 11:22:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:08,394 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-20 11:22:08,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 11:22:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-20 11:22:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:22:08,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:08,403 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:08,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:08,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:08,611 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2022-11-20 11:22:08,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:08,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782610166] [2022-11-20 11:22:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:08,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:08,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:22:08,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104274873] [2022-11-20 11:22:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:08,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:08,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:08,626 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:08,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:22:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:08,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:22:08,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:22:08,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:22:08,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782610166] [2022-11-20 11:22:08,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:22:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104274873] [2022-11-20 11:22:08,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104274873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:08,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:08,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-20 11:22:08,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301863199] [2022-11-20 11:22:08,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:08,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:22:08,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:22:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:22:08,953 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 11:22:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:09,220 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2022-11-20 11:22:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:22:09,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2022-11-20 11:22:09,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:09,222 INFO L225 Difference]: With dead ends: 125 [2022-11-20 11:22:09,222 INFO L226 Difference]: Without dead ends: 104 [2022-11-20 11:22:09,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:22:09,224 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 89 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:09,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 215 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:22:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-20 11:22:09,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2022-11-20 11:22:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 11:22:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-11-20 11:22:09,272 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2022-11-20 11:22:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:09,272 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-11-20 11:22:09,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 11:22:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-11-20 11:22:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:22:09,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:09,274 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:09,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 11:22:09,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 11:22:09,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:09,481 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2022-11-20 11:22:09,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:09,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488225398] [2022-11-20 11:22:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:09,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:09,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:22:09,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714200035] [2022-11-20 11:22:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:09,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:09,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:09,496 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:09,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:22:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:22:09,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 11:22:09,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:09,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:09,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488225398] [2022-11-20 11:22:09,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:22:09,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714200035] [2022-11-20 11:22:09,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714200035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:09,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:09,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:22:09,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321186810] [2022-11-20 11:22:09,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:09,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:22:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:22:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:22:09,636 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 11:22:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:09,750 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2022-11-20 11:22:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:22:09,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2022-11-20 11:22:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:09,754 INFO L225 Difference]: With dead ends: 154 [2022-11-20 11:22:09,755 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 11:22:09,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:22:09,756 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 19 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 109 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 [2022-11-20 11:22:09,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 109 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:22:09,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 11:22:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-11-20 11:22:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 11:22:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2022-11-20 11:22:09,811 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2022-11-20 11:22:09,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:09,812 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2022-11-20 11:22:09,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 11:22:09,812 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2022-11-20 11:22:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:22:09,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:09,814 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:09,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:10,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:10,026 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2022-11-20 11:22:10,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:10,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488833323] [2022-11-20 11:22:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:10,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:10,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:22:10,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244971062] [2022-11-20 11:22:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:10,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:10,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:10,041 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:10,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:22:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:22:10,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:22:10,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 11:22:10,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:10,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488833323] [2022-11-20 11:22:10,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:22:10,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244971062] [2022-11-20 11:22:10,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244971062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:10,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:10,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-11-20 11:22:10,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896055555] [2022-11-20 11:22:10,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:10,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:22:10,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:22:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:22:10,397 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-20 11:22:10,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:10,767 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2022-11-20 11:22:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:22:10,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2022-11-20 11:22:10,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:10,772 INFO L225 Difference]: With dead ends: 215 [2022-11-20 11:22:10,772 INFO L226 Difference]: Without dead ends: 168 [2022-11-20 11:22:10,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:22:10,778 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 156 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:10,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 234 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:22:10,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-20 11:22:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2022-11-20 11:22:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-20 11:22:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2022-11-20 11:22:10,871 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2022-11-20 11:22:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:10,873 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2022-11-20 11:22:10,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-20 11:22:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2022-11-20 11:22:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:22:10,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:10,877 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:10,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:11,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 11:22:11,084 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2022-11-20 11:22:11,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:11,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134853623] [2022-11-20 11:22:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:11,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:22:11,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962013340] [2022-11-20 11:22:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:11,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:11,112 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:11,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:22:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:11,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:22:11,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:22:11,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:22:11,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:11,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134853623] [2022-11-20 11:22:11,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:22:11,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962013340] [2022-11-20 11:22:11,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962013340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:11,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:11,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-20 11:22:11,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660833398] [2022-11-20 11:22:11,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:11,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:22:11,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:22:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:22:11,518 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-20 11:22:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:12,004 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2022-11-20 11:22:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:22:12,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2022-11-20 11:22:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:12,009 INFO L225 Difference]: With dead ends: 207 [2022-11-20 11:22:12,010 INFO L226 Difference]: Without dead ends: 202 [2022-11-20 11:22:12,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:22:12,011 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 213 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:12,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 234 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:22:12,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-20 11:22:12,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2022-11-20 11:22:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-20 11:22:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2022-11-20 11:22:12,101 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2022-11-20 11:22:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:12,102 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2022-11-20 11:22:12,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-20 11:22:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2022-11-20 11:22:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 11:22:12,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:12,105 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:12,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:22:12,312 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2022-11-20 11:22:12,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:12,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255160576] [2022-11-20 11:22:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:12,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:12,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:22:12,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474364551] [2022-11-20 11:22:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:12,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:12,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:12,345 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:12,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:22:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:12,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:22:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-20 11:22:12,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-20 11:22:12,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:12,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255160576] [2022-11-20 11:22:12,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:22:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474364551] [2022-11-20 11:22:12,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474364551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:12,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:12,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-20 11:22:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047257684] [2022-11-20 11:22:12,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:12,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:22:12,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:22:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:22:12,634 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 11:22:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:12,931 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2022-11-20 11:22:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:22:12,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2022-11-20 11:22:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:12,935 INFO L225 Difference]: With dead ends: 498 [2022-11-20 11:22:12,935 INFO L226 Difference]: Without dead ends: 355 [2022-11-20 11:22:12,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:22:12,937 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:12,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:22:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-20 11:22:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2022-11-20 11:22:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2022-11-20 11:22:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2022-11-20 11:22:13,109 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2022-11-20 11:22:13,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:13,109 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2022-11-20 11:22:13,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 11:22:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2022-11-20 11:22:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 11:22:13,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:13,113 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:13,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:13,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:22:13,319 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2022-11-20 11:22:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:13,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353712701] [2022-11-20 11:22:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:13,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:13,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:22:13,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661186071] [2022-11-20 11:22:13,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:22:13,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:13,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:13,336 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:13,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:22:13,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:22:13,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:22:13,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:22:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:22:13,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-20 11:22:13,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:13,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353712701] [2022-11-20 11:22:13,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:22:13,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661186071] [2022-11-20 11:22:13,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661186071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:13,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:13,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2022-11-20 11:22:13,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114221128] [2022-11-20 11:22:13,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:13,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:22:13,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:13,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:22:13,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:22:13,887 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 11 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2022-11-20 11:22:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:14,414 INFO L93 Difference]: Finished difference Result 467 states and 646 transitions. [2022-11-20 11:22:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:22:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 11 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) Word has length 87 [2022-11-20 11:22:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:14,422 INFO L225 Difference]: With dead ends: 467 [2022-11-20 11:22:14,422 INFO L226 Difference]: Without dead ends: 348 [2022-11-20 11:22:14,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 154 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:22:14,424 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 121 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:14,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 243 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:22:14,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-20 11:22:14,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2022-11-20 11:22:14,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 262 states have (on average 1.2251908396946565) internal successors, (321), 262 states have internal predecessors, (321), 70 states have call successors, (70), 12 states have call predecessors, (70), 11 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-20 11:22:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 460 transitions. [2022-11-20 11:22:14,587 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 460 transitions. Word has length 87 [2022-11-20 11:22:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:14,588 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 460 transitions. [2022-11-20 11:22:14,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 11 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2022-11-20 11:22:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 460 transitions. [2022-11-20 11:22:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-20 11:22:14,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:14,598 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:14,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:14,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:22:14,808 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:14,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2022-11-20 11:22:14,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:14,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944641802] [2022-11-20 11:22:14,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:14,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:22:14,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248596581] [2022-11-20 11:22:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:14,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:14,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:14,852 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:14,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:22:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:14,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:22:14,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:22:15,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-20 11:22:15,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:15,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944641802] [2022-11-20 11:22:15,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:22:15,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248596581] [2022-11-20 11:22:15,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248596581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:15,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:15,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2022-11-20 11:22:15,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375157405] [2022-11-20 11:22:15,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:15,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:22:15,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:22:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:22:15,462 INFO L87 Difference]: Start difference. First operand 344 states and 460 transitions. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 11 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-20 11:22:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:15,950 INFO L93 Difference]: Finished difference Result 453 states and 622 transitions. [2022-11-20 11:22:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:22:15,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 11 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 93 [2022-11-20 11:22:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:15,953 INFO L225 Difference]: With dead ends: 453 [2022-11-20 11:22:15,953 INFO L226 Difference]: Without dead ends: 342 [2022-11-20 11:22:15,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 162 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:22:15,955 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 131 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:15,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 219 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:22:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-20 11:22:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-11-20 11:22:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 260 states have (on average 1.2) internal successors, (312), 260 states have internal predecessors, (312), 70 states have call successors, (70), 12 states have call predecessors, (70), 11 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-20 11:22:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 451 transitions. [2022-11-20 11:22:16,117 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 451 transitions. Word has length 93 [2022-11-20 11:22:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:16,117 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 451 transitions. [2022-11-20 11:22:16,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 11 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-20 11:22:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 451 transitions. [2022-11-20 11:22:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 11:22:16,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:16,120 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:16,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:16,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:16,327 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2022-11-20 11:22:16,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:16,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403684225] [2022-11-20 11:22:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:16,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:16,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 11:22:16,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081918396] [2022-11-20 11:22:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:16,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:16,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:16,348 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:16,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:22:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:22:16,459 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:22:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:22:16,567 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:22:16,567 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:22:16,568 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 11:22:16,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:16,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:22:16,782 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:16,787 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 11:22:16,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:22:16 BoogieIcfgContainer [2022-11-20 11:22:16,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 11:22:16,863 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 11:22:16,863 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 11:22:16,864 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 11:22:16,864 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:21:54" (3/4) ... [2022-11-20 11:22:16,866 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 11:22:17,048 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 11:22:17,048 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 11:22:17,049 INFO L158 Benchmark]: Toolchain (without parser) took 22886.77ms. Allocated memory was 142.6MB in the beginning and 186.6MB in the end (delta: 44.0MB). Free memory was 111.2MB in the beginning and 83.5MB in the end (delta: 27.7MB). Peak memory consumption was 74.3MB. Max. memory is 16.1GB. [2022-11-20 11:22:17,049 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 142.6MB. Free memory is still 113.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:22:17,049 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.14ms. Allocated memory is still 142.6MB. Free memory was 110.6MB in the beginning and 100.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:22:17,050 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.52ms. Allocated memory is still 142.6MB. Free memory was 100.2MB in the beginning and 98.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:22:17,050 INFO L158 Benchmark]: Boogie Preprocessor took 26.85ms. Allocated memory is still 142.6MB. Free memory was 98.8MB in the beginning and 97.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 11:22:17,050 INFO L158 Benchmark]: RCFGBuilder took 421.42ms. Allocated memory is still 142.6MB. Free memory was 97.6MB in the beginning and 85.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 11:22:17,051 INFO L158 Benchmark]: TraceAbstraction took 21920.28ms. Allocated memory was 142.6MB in the beginning and 186.6MB in the end (delta: 44.0MB). Free memory was 85.0MB in the beginning and 91.4MB in the end (delta: -6.3MB). Peak memory consumption was 38.6MB. Max. memory is 16.1GB. [2022-11-20 11:22:17,051 INFO L158 Benchmark]: Witness Printer took 184.62ms. Allocated memory is still 186.6MB. Free memory was 91.4MB in the beginning and 83.5MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 11:22:17,053 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 142.6MB. Free memory is still 113.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.14ms. Allocated memory is still 142.6MB. Free memory was 110.6MB in the beginning and 100.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.52ms. Allocated memory is still 142.6MB. Free memory was 100.2MB in the beginning and 98.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.85ms. Allocated memory is still 142.6MB. Free memory was 98.8MB in the beginning and 97.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 421.42ms. Allocated memory is still 142.6MB. Free memory was 97.6MB in the beginning and 85.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 21920.28ms. Allocated memory was 142.6MB in the beginning and 186.6MB in the end (delta: 44.0MB). Free memory was 85.0MB in the beginning and 91.4MB in the end (delta: -6.3MB). Peak memory consumption was 38.6MB. Max. memory is 16.1GB. * Witness Printer took 184.62ms. Allocated memory is still 186.6MB. Free memory was 91.4MB in the beginning and 83.5MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [A=7, counter=0, R=2] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [A=7, counter=0, R=2] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [A=7, counter=0, R=2, r=-3, u=5, v=1] [L34] EXPR counter++ VAL [A=7, counter=1, counter++=0, r=-3, R=2, u=5, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=1, R=2, r=-3, u=5, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=7, counter=1, R=2, r=-3, u=5, v=1] [L39] EXPR counter++ VAL [A=7, counter=2, counter++=1, r=-3, R=2, u=5, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=2, R=2, r=-3, u=5, v=1] [L41] COND TRUE !(r > 0) VAL [A=7, counter=2, R=2, r=-3, u=5, v=1] [L47] EXPR counter++ VAL [A=7, counter=3, counter++=2, r=-3, R=2, u=5, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=3, R=2, r=-3, u=5, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=7, counter=3, r=2, R=2, u=7, v=1] [L47] EXPR counter++ VAL [A=7, counter=4, counter++=3, r=2, R=2, u=7, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=4, r=2, R=2, u=7, v=1] [L49] COND TRUE !(r < 0) VAL [A=7, counter=4, r=2, R=2, u=7, v=1] [L34] EXPR counter++ VAL [A=7, counter=5, counter++=4, r=2, R=2, u=7, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=5, r=2, R=2, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=7, counter=5, R=2, r=2, u=7, v=1] [L39] EXPR counter++ VAL [A=7, counter=6, counter++=5, R=2, r=2, u=7, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=6, R=2, r=2, u=7, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=7, counter=6, r=1, R=2, u=7, v=3] [L39] EXPR counter++ VAL [A=7, counter=7, counter++=6, R=2, r=1, u=7, v=3] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=7, r=1, R=2, u=7, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=7, counter=7, R=2, r=-2, u=7, v=5] [L39] EXPR counter++ VAL [A=7, counter=8, counter++=7, R=2, r=-2, u=7, v=5] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=8, r=-2, R=2, u=7, v=5] [L41] COND TRUE !(r > 0) VAL [A=7, counter=8, r=-2, R=2, u=7, v=5] [L47] EXPR counter++ VAL [A=7, counter=9, counter++=8, r=-2, R=2, u=7, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=9, R=2, r=-2, u=7, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=7, counter=9, r=5, R=2, u=9, v=5] [L47] EXPR counter++ VAL [A=7, counter=10, counter++=9, r=5, R=2, u=9, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=10, R=2, r=5, u=9, v=5] [L49] COND TRUE !(r < 0) VAL [A=7, counter=10, r=5, R=2, u=9, v=5] [L34] EXPR counter++ VAL [A=7, counter=11, counter++=10, r=5, R=2, u=9, v=5] [L34] COND FALSE !(counter++<10) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=11] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.7s, OverallIterations: 14, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 12.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 850 SdHoareTripleChecker+Valid, 10.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 836 mSDsluCounter, 2000 SdHoareTripleChecker+Invalid, 10.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1442 mSDsCounter, 373 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 896 IncrementalHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 373 mSolverCounterUnsat, 558 mSDtfsCounter, 896 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1073 GetRequests, 933 SyntacticMatches, 19 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=344occurred in iteration=12, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 89 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 693 NumberOfCodeBlocks, 693 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1037 ConstructedInterpolants, 0 QuantifiedInterpolants, 2387 SizeOfPredicates, 40 NumberOfNonLiveVariables, 1619 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 21 InterpolantComputations, 6 PerfectInterpolantSequences, 934/1396 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 RESULT: Ultimate proved your program to be incorrect! [2022-11-20 11:22:17,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678d03b4-8d50-4974-8da4-7962de1904e9/bin/uautomizer-ug76WZFUDN/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE