./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8 --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 c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 --- 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-e04fb08 [2022-11-16 10:57:49,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 10:57:49,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 10:57:49,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 10:57:49,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 10:57:49,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 10:57:49,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 10:57:49,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 10:57:49,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 10:57:49,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 10:57:49,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 10:57:49,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 10:57:49,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 10:57:49,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 10:57:49,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 10:57:49,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 10:57:49,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 10:57:49,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 10:57:49,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 10:57:50,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 10:57:50,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 10:57:50,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 10:57:50,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 10:57:50,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 10:57:50,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 10:57:50,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 10:57:50,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 10:57:50,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 10:57:50,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 10:57:50,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 10:57:50,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 10:57:50,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 10:57:50,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 10:57:50,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 10:57:50,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 10:57:50,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 10:57:50,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 10:57:50,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 10:57:50,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 10:57:50,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 10:57:50,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 10:57:50,031 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 10:57:50,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 10:57:50,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 10:57:50,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 10:57:50,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 10:57:50,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 10:57:50,072 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 10:57:50,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 10:57:50,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 10:57:50,073 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 10:57:50,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 10:57:50,074 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 10:57:50,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 10:57:50,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 10:57:50,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 10:57:50,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 10:57:50,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 10:57:50,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 10:57:50,075 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 10:57:50,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 10:57:50,075 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 10:57:50,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 10:57:50,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 10:57:50,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 10:57:50,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 10:57:50,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:57:50,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 10:57:50,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 10:57:50,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 10:57:50,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 10:57:50,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 10:57:50,079 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 10:57:50,080 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 10:57:50,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 10:57:50,080 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_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 [2022-11-16 10:57:50,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 10:57:50,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 10:57:50,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 10:57:50,397 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 10:57:50,398 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 10:57:50,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2022-11-16 10:57:50,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/data/b533517ea/e22fdf97cf3a474e8fcf2529085f4110/FLAGb2c5cb504 [2022-11-16 10:57:51,167 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 10:57:51,167 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2022-11-16 10:57:51,188 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/data/b533517ea/e22fdf97cf3a474e8fcf2529085f4110/FLAGb2c5cb504 [2022-11-16 10:57:51,373 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/data/b533517ea/e22fdf97cf3a474e8fcf2529085f4110 [2022-11-16 10:57:51,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 10:57:51,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 10:57:51,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 10:57:51,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 10:57:51,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 10:57:51,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:57:51" (1/1) ... [2022-11-16 10:57:51,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c9452b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:51, skipping insertion in model container [2022-11-16 10:57:51,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:57:51" (1/1) ... [2022-11-16 10:57:51,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 10:57:51,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:57:52,071 WARN L229 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_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i[33022,33035] [2022-11-16 10:57:52,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:57:52,358 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 10:57:52,385 WARN L229 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_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i[33022,33035] [2022-11-16 10:57:52,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:57:52,638 INFO L208 MainTranslator]: Completed translation [2022-11-16 10:57:52,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52 WrapperNode [2022-11-16 10:57:52,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 10:57:52,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 10:57:52,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 10:57:52,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 10:57:52,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (1/1) ... [2022-11-16 10:57:52,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (1/1) ... [2022-11-16 10:57:52,848 INFO L138 Inliner]: procedures = 177, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2459 [2022-11-16 10:57:52,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 10:57:52,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 10:57:52,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 10:57:52,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 10:57:52,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (1/1) ... [2022-11-16 10:57:52,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (1/1) ... [2022-11-16 10:57:52,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (1/1) ... [2022-11-16 10:57:52,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (1/1) ... [2022-11-16 10:57:52,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (1/1) ... [2022-11-16 10:57:53,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (1/1) ... [2022-11-16 10:57:53,049 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (1/1) ... [2022-11-16 10:57:53,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (1/1) ... [2022-11-16 10:57:53,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 10:57:53,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 10:57:53,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 10:57:53,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 10:57:53,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (1/1) ... [2022-11-16 10:57:53,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:57:53,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:53,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 10:57:53,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 10:57:53,191 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-11-16 10:57:53,191 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-11-16 10:57:53,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 10:57:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 10:57:53,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 10:57:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 10:57:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-16 10:57:53,194 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-16 10:57:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 10:57:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 10:57:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 10:57:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 10:57:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-16 10:57:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 10:57:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 10:57:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 10:57:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 10:57:53,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 10:57:53,620 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 10:57:53,623 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 10:57:56,709 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 10:57:56,732 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 10:57:56,732 INFO L300 CfgBuilder]: Removed 168 assume(true) statements. [2022-11-16 10:57:56,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:57:56 BoogieIcfgContainer [2022-11-16 10:57:56,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 10:57:56,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 10:57:56,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 10:57:56,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 10:57:56,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 10:57:51" (1/3) ... [2022-11-16 10:57:56,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6923a079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:57:56, skipping insertion in model container [2022-11-16 10:57:56,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:52" (2/3) ... [2022-11-16 10:57:56,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6923a079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:57:56, skipping insertion in model container [2022-11-16 10:57:56,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:57:56" (3/3) ... [2022-11-16 10:57:56,751 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test10-3.i [2022-11-16 10:57:56,772 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 10:57:56,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 10:57:56,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 10:57:56,854 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;@5a784b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 10:57:56,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 10:57:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 474 states, 455 states have (on average 1.7142857142857142) internal successors, (780), 460 states have internal predecessors, (780), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 10:57:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 10:57:56,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:56,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:56,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:57:56,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash 210225997, now seen corresponding path program 1 times [2022-11-16 10:57:56,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:56,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475631387] [2022-11-16 10:57:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:56,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:57,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:57,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475631387] [2022-11-16 10:57:57,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475631387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:57,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:57,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:57:57,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109231816] [2022-11-16 10:57:57,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:57,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 10:57:57,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:57,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 10:57:57,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 10:57:57,176 INFO L87 Difference]: Start difference. First operand has 474 states, 455 states have (on average 1.7142857142857142) internal successors, (780), 460 states have internal predecessors, (780), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:57,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:57,304 INFO L93 Difference]: Finished difference Result 946 states and 1622 transitions. [2022-11-16 10:57:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 10:57:57,309 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 10:57:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:57,336 INFO L225 Difference]: With dead ends: 946 [2022-11-16 10:57:57,336 INFO L226 Difference]: Without dead ends: 420 [2022-11-16 10:57:57,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 10:57:57,351 INFO L413 NwaCegarLoop]: 632 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, 632 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 [2022-11-16 10:57:57,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 10:57:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-16 10:57:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2022-11-16 10:57:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 402 states have (on average 1.3233830845771144) internal successors, (532), 407 states have internal predecessors, (532), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 10:57:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 559 transitions. [2022-11-16 10:57:57,460 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 559 transitions. Word has length 13 [2022-11-16 10:57:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:57,461 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 559 transitions. [2022-11-16 10:57:57,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 559 transitions. [2022-11-16 10:57:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 10:57:57,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:57,470 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:57,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 10:57:57,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:57:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:57,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1084411649, now seen corresponding path program 1 times [2022-11-16 10:57:57,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:57,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42969370] [2022-11-16 10:57:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:57,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:58,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:58,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42969370] [2022-11-16 10:57:58,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42969370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:58,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:58,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:58,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599106006] [2022-11-16 10:57:58,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:58,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:58,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:58,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:58,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:58,083 INFO L87 Difference]: Start difference. First operand 420 states and 559 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:58,851 INFO L93 Difference]: Finished difference Result 741 states and 991 transitions. [2022-11-16 10:57:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:57:58,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-16 10:57:58,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:58,857 INFO L225 Difference]: With dead ends: 741 [2022-11-16 10:57:58,858 INFO L226 Difference]: Without dead ends: 495 [2022-11-16 10:57:58,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:58,860 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 97 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:58,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1455 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 10:57:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-16 10:57:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 422. [2022-11-16 10:57:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 404 states have (on average 1.3217821782178218) internal successors, (534), 409 states have internal predecessors, (534), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 10:57:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 561 transitions. [2022-11-16 10:57:58,892 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 561 transitions. Word has length 48 [2022-11-16 10:57:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:58,892 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 561 transitions. [2022-11-16 10:57:58,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 561 transitions. [2022-11-16 10:57:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 10:57:58,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:58,905 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:58,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 10:57:58,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:57:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:58,907 INFO L85 PathProgramCache]: Analyzing trace with hash -371947318, now seen corresponding path program 1 times [2022-11-16 10:57:58,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:58,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77233917] [2022-11-16 10:57:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:59,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:57:59,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393273518] [2022-11-16 10:57:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:59,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:59,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:59,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:57:59,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 10:58:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:00,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 10:58:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:58:00,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:00,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:00,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77233917] [2022-11-16 10:58:00,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:00,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393273518] [2022-11-16 10:58:00,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393273518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:00,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:00,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:58:00,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384587820] [2022-11-16 10:58:00,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:00,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:58:00,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:00,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:58:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:58:00,146 INFO L87 Difference]: Start difference. First operand 422 states and 561 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:00,232 INFO L93 Difference]: Finished difference Result 861 states and 1149 transitions. [2022-11-16 10:58:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:58:00,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-16 10:58:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:00,235 INFO L225 Difference]: With dead ends: 861 [2022-11-16 10:58:00,235 INFO L226 Difference]: Without dead ends: 443 [2022-11-16 10:58:00,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:58:00,237 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 9 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:00,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1063 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:58:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-16 10:58:00,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 442. [2022-11-16 10:58:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 424 states have (on average 1.3066037735849056) internal successors, (554), 429 states have internal predecessors, (554), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 10:58:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 581 transitions. [2022-11-16 10:58:00,255 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 581 transitions. Word has length 101 [2022-11-16 10:58:00,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:00,255 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 581 transitions. [2022-11-16 10:58:00,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:00,256 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 581 transitions. [2022-11-16 10:58:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 10:58:00,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:00,260 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:00,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 10:58:00,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:00,469 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:00,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:00,470 INFO L85 PathProgramCache]: Analyzing trace with hash -612187064, now seen corresponding path program 1 times [2022-11-16 10:58:00,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:00,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231727133] [2022-11-16 10:58:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:00,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:00,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:00,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25162154] [2022-11-16 10:58:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:00,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:00,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:00,647 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:00,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 10:58:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:01,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1679 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 10:58:01,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:58:01,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:01,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:01,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231727133] [2022-11-16 10:58:01,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:01,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25162154] [2022-11-16 10:58:01,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25162154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:01,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:01,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:58:01,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563522243] [2022-11-16 10:58:01,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:01,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:58:01,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:01,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:58:01,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:58:01,666 INFO L87 Difference]: Start difference. First operand 442 states and 581 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:01,773 INFO L93 Difference]: Finished difference Result 697 states and 928 transitions. [2022-11-16 10:58:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:58:01,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-16 10:58:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:01,776 INFO L225 Difference]: With dead ends: 697 [2022-11-16 10:58:01,777 INFO L226 Difference]: Without dead ends: 463 [2022-11-16 10:58:01,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:58:01,779 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 10 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:01,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1063 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:58:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-16 10:58:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 462. [2022-11-16 10:58:01,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 444 states have (on average 1.2927927927927927) internal successors, (574), 449 states have internal predecessors, (574), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 10:58:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 601 transitions. [2022-11-16 10:58:01,795 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 601 transitions. Word has length 101 [2022-11-16 10:58:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:01,796 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 601 transitions. [2022-11-16 10:58:01,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 601 transitions. [2022-11-16 10:58:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 10:58:01,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:01,798 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:01,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:02,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:02,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1776324428, now seen corresponding path program 1 times [2022-11-16 10:58:02,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:02,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665688502] [2022-11-16 10:58:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:02,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427741850] [2022-11-16 10:58:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:02,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:02,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:02,212 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:02,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 10:58:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:03,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 10:58:03,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:58:03,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:03,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:03,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665688502] [2022-11-16 10:58:03,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:03,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427741850] [2022-11-16 10:58:03,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427741850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:03,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:03,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:58:03,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713541064] [2022-11-16 10:58:03,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:03,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:58:03,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:03,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:58:03,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:58:03,483 INFO L87 Difference]: Start difference. First operand 462 states and 601 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:03,623 INFO L93 Difference]: Finished difference Result 994 states and 1299 transitions. [2022-11-16 10:58:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:58:03,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-16 10:58:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:03,627 INFO L225 Difference]: With dead ends: 994 [2022-11-16 10:58:03,628 INFO L226 Difference]: Without dead ends: 536 [2022-11-16 10:58:03,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:03,633 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 507 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:03,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 1387 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:58:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-16 10:58:03,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 448. [2022-11-16 10:58:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 430 states have (on average 1.286046511627907) internal successors, (553), 435 states have internal predecessors, (553), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 10:58:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 580 transitions. [2022-11-16 10:58:03,658 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 580 transitions. Word has length 101 [2022-11-16 10:58:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:03,659 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 580 transitions. [2022-11-16 10:58:03,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:03,659 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 580 transitions. [2022-11-16 10:58:03,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 10:58:03,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:03,666 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:03,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:03,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:03,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:03,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:03,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1464846374, now seen corresponding path program 1 times [2022-11-16 10:58:03,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:03,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764134758] [2022-11-16 10:58:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:03,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:04,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:04,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031462148] [2022-11-16 10:58:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:04,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:04,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:04,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:04,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 10:58:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:05,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1669 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 10:58:05,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:58:05,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:05,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:05,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764134758] [2022-11-16 10:58:05,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:05,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031462148] [2022-11-16 10:58:05,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031462148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:05,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:05,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:58:05,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022695739] [2022-11-16 10:58:05,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:05,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:58:05,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:05,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:58:05,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:58:05,228 INFO L87 Difference]: Start difference. First operand 448 states and 580 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:05,341 INFO L93 Difference]: Finished difference Result 671 states and 876 transitions. [2022-11-16 10:58:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:58:05,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-16 10:58:05,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:05,345 INFO L225 Difference]: With dead ends: 671 [2022-11-16 10:58:05,345 INFO L226 Difference]: Without dead ends: 435 [2022-11-16 10:58:05,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:05,347 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 294 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:05,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 1290 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:58:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-16 10:58:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 434. [2022-11-16 10:58:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 416 states have (on average 1.2788461538461537) internal successors, (532), 421 states have internal predecessors, (532), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 10:58:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 559 transitions. [2022-11-16 10:58:05,364 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 559 transitions. Word has length 101 [2022-11-16 10:58:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:05,364 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 559 transitions. [2022-11-16 10:58:05,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 559 transitions. [2022-11-16 10:58:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 10:58:05,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:05,367 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:05,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:05,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 10:58:05,579 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:05,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:05,579 INFO L85 PathProgramCache]: Analyzing trace with hash -987630068, now seen corresponding path program 1 times [2022-11-16 10:58:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:05,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099980495] [2022-11-16 10:58:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:05,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:05,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:05,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512868157] [2022-11-16 10:58:05,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:05,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:05,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:05,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:05,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 10:58:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:06,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 10:58:06,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:58:07,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:07,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:07,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099980495] [2022-11-16 10:58:07,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:07,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512868157] [2022-11-16 10:58:07,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512868157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:07,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:07,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:58:07,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143765754] [2022-11-16 10:58:07,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:07,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:58:07,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:07,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:58:07,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:58:07,061 INFO L87 Difference]: Start difference. First operand 434 states and 559 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:07,155 INFO L93 Difference]: Finished difference Result 1092 states and 1409 transitions. [2022-11-16 10:58:07,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:58:07,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-16 10:58:07,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:07,163 INFO L225 Difference]: With dead ends: 1092 [2022-11-16 10:58:07,163 INFO L226 Difference]: Without dead ends: 662 [2022-11-16 10:58:07,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:58:07,165 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 247 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:07,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1142 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:58:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-11-16 10:58:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 658. [2022-11-16 10:58:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 635 states have (on average 1.2771653543307087) internal successors, (811), 640 states have internal predecessors, (811), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 10:58:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 848 transitions. [2022-11-16 10:58:07,188 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 848 transitions. Word has length 101 [2022-11-16 10:58:07,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:07,189 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 848 transitions. [2022-11-16 10:58:07,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:07,189 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 848 transitions. [2022-11-16 10:58:07,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 10:58:07,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:07,191 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:07,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:07,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 10:58:07,402 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash -263981483, now seen corresponding path program 1 times [2022-11-16 10:58:07,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:07,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233257350] [2022-11-16 10:58:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:07,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:07,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:07,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798914909] [2022-11-16 10:58:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:07,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:07,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:07,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:07,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 10:58:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:08,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 10:58:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:08,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 10:58:08,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 10:58:08,464 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 10:58:08,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 10:58:08,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:58:08,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 10:58:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:08,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:08,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:08,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233257350] [2022-11-16 10:58:08,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:08,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798914909] [2022-11-16 10:58:08,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798914909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:08,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:08,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 10:58:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540826460] [2022-11-16 10:58:08,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:08,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:58:08,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:08,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:58:08,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:08,525 INFO L87 Difference]: Start difference. First operand 658 states and 848 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 10:58:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:09,674 INFO L93 Difference]: Finished difference Result 1228 states and 1581 transitions. [2022-11-16 10:58:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:58:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2022-11-16 10:58:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:09,678 INFO L225 Difference]: With dead ends: 1228 [2022-11-16 10:58:09,678 INFO L226 Difference]: Without dead ends: 658 [2022-11-16 10:58:09,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 10:58:09,680 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 97 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:09,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1819 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 10:58:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-11-16 10:58:09,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 658. [2022-11-16 10:58:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 635 states have (on average 1.2755905511811023) internal successors, (810), 640 states have internal predecessors, (810), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 10:58:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 847 transitions. [2022-11-16 10:58:09,705 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 847 transitions. Word has length 116 [2022-11-16 10:58:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:09,705 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 847 transitions. [2022-11-16 10:58:09,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 10:58:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 847 transitions. [2022-11-16 10:58:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-16 10:58:09,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:09,708 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:09,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:09,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:09,922 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1573589792, now seen corresponding path program 1 times [2022-11-16 10:58:09,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:09,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813337211] [2022-11-16 10:58:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:09,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:10,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:10,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888453711] [2022-11-16 10:58:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:10,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:10,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:10,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:10,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 10:58:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:11,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 2237 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 10:58:11,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:11,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:11,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:11,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813337211] [2022-11-16 10:58:11,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:11,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888453711] [2022-11-16 10:58:11,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888453711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:11,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:11,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:58:11,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063224472] [2022-11-16 10:58:11,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:11,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:58:11,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:11,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:58:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:58:11,522 INFO L87 Difference]: Start difference. First operand 658 states and 847 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 10:58:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:11,646 INFO L93 Difference]: Finished difference Result 1340 states and 1735 transitions. [2022-11-16 10:58:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:58:11,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-11-16 10:58:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:11,650 INFO L225 Difference]: With dead ends: 1340 [2022-11-16 10:58:11,650 INFO L226 Difference]: Without dead ends: 700 [2022-11-16 10:58:11,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:58:11,655 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 9 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:11,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1035 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:58:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-16 10:58:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 698. [2022-11-16 10:58:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 675 states have (on average 1.2592592592592593) internal successors, (850), 680 states have internal predecessors, (850), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 10:58:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 887 transitions. [2022-11-16 10:58:11,682 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 887 transitions. Word has length 163 [2022-11-16 10:58:11,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:11,683 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 887 transitions. [2022-11-16 10:58:11,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 10:58:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 887 transitions. [2022-11-16 10:58:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-16 10:58:11,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:11,686 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:11,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 10:58:11,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:11,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:11,897 INFO L85 PathProgramCache]: Analyzing trace with hash -357535842, now seen corresponding path program 1 times [2022-11-16 10:58:11,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:11,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24665588] [2022-11-16 10:58:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:11,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:12,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:12,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169062483] [2022-11-16 10:58:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:12,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:12,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:12,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:12,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 10:58:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:13,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 2239 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 10:58:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:13,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:13,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:13,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24665588] [2022-11-16 10:58:13,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:13,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169062483] [2022-11-16 10:58:13,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169062483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:13,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:13,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:58:13,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047888339] [2022-11-16 10:58:13,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:13,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:58:13,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:13,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:58:13,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:58:13,569 INFO L87 Difference]: Start difference. First operand 698 states and 887 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 10:58:13,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:13,675 INFO L93 Difference]: Finished difference Result 1334 states and 1700 transitions. [2022-11-16 10:58:13,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:58:13,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-11-16 10:58:13,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:13,679 INFO L225 Difference]: With dead ends: 1334 [2022-11-16 10:58:13,679 INFO L226 Difference]: Without dead ends: 672 [2022-11-16 10:58:13,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:13,681 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 493 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:13,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 1087 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:58:13,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-16 10:58:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 670. [2022-11-16 10:58:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 647 states have (on average 1.248840803709428) internal successors, (808), 652 states have internal predecessors, (808), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 10:58:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 845 transitions. [2022-11-16 10:58:13,707 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 845 transitions. Word has length 163 [2022-11-16 10:58:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:13,708 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 845 transitions. [2022-11-16 10:58:13,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 10:58:13,708 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 845 transitions. [2022-11-16 10:58:13,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-16 10:58:13,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:13,711 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:13,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:13,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 10:58:13,930 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:13,930 INFO L85 PathProgramCache]: Analyzing trace with hash -509250644, now seen corresponding path program 1 times [2022-11-16 10:58:13,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:13,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636034943] [2022-11-16 10:58:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:13,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:14,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:14,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927788027] [2022-11-16 10:58:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:14,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:14,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:14,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:14,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 10:58:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 2225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 10:58:15,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:15,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:15,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:15,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636034943] [2022-11-16 10:58:15,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:15,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927788027] [2022-11-16 10:58:15,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927788027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:15,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:15,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:58:15,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933942953] [2022-11-16 10:58:15,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:15,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:58:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:15,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:58:15,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:58:15,890 INFO L87 Difference]: Start difference. First operand 670 states and 845 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 10:58:15,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:15,991 INFO L93 Difference]: Finished difference Result 1521 states and 1944 transitions. [2022-11-16 10:58:15,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:58:15,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-11-16 10:58:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:15,996 INFO L225 Difference]: With dead ends: 1521 [2022-11-16 10:58:15,996 INFO L226 Difference]: Without dead ends: 909 [2022-11-16 10:58:16,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:58:16,000 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 220 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:16,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1049 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:58:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-16 10:58:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 807. [2022-11-16 10:58:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 781 states have (on average 1.259923175416133) internal successors, (984), 786 states have internal predecessors, (984), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-16 10:58:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1027 transitions. [2022-11-16 10:58:16,033 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1027 transitions. Word has length 163 [2022-11-16 10:58:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:16,035 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1027 transitions. [2022-11-16 10:58:16,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 10:58:16,035 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1027 transitions. [2022-11-16 10:58:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-16 10:58:16,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:16,038 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:16,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:16,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:16,250 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:16,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash 936600271, now seen corresponding path program 1 times [2022-11-16 10:58:16,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:16,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285963630] [2022-11-16 10:58:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:16,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:16,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:16,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426687403] [2022-11-16 10:58:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:16,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:16,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:16,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:16,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 10:58:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:17,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 10:58:17,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 10:58:18,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:18,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:18,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285963630] [2022-11-16 10:58:18,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:18,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426687403] [2022-11-16 10:58:18,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426687403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:18,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:18,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:58:18,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969076215] [2022-11-16 10:58:18,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:18,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:58:18,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:18,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:58:18,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:58:18,088 INFO L87 Difference]: Start difference. First operand 807 states and 1027 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 10:58:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:18,674 INFO L93 Difference]: Finished difference Result 1332 states and 1701 transitions. [2022-11-16 10:58:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:58:18,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 178 [2022-11-16 10:58:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:18,678 INFO L225 Difference]: With dead ends: 1332 [2022-11-16 10:58:18,678 INFO L226 Difference]: Without dead ends: 659 [2022-11-16 10:58:18,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:18,680 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 823 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:18,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 635 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 10:58:18,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-11-16 10:58:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2022-11-16 10:58:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 638 states have (on average 1.244514106583072) internal successors, (794), 643 states have internal predecessors, (794), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-16 10:58:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 827 transitions. [2022-11-16 10:58:18,708 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 827 transitions. Word has length 178 [2022-11-16 10:58:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:18,709 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 827 transitions. [2022-11-16 10:58:18,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 10:58:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 827 transitions. [2022-11-16 10:58:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-16 10:58:18,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:18,712 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:18,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:18,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 10:58:18,923 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:18,923 INFO L85 PathProgramCache]: Analyzing trace with hash 105070510, now seen corresponding path program 1 times [2022-11-16 10:58:18,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:18,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11866280] [2022-11-16 10:58:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:18,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:19,016 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:19,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857794523] [2022-11-16 10:58:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:19,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:19,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:19,018 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:19,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:01:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:21,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:01:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:01:21,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:21,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:01:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11866280] [2022-11-16 11:01:21,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:01:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857794523] [2022-11-16 11:01:21,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857794523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:21,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:21,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:01:21,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502711075] [2022-11-16 11:01:21,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:21,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:01:21,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:01:21,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:01:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:21,345 INFO L87 Difference]: Start difference. First operand 659 states and 827 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:01:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:21,419 INFO L93 Difference]: Finished difference Result 1269 states and 1606 transitions. [2022-11-16 11:01:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:01:21,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 185 [2022-11-16 11:01:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:21,423 INFO L225 Difference]: With dead ends: 1269 [2022-11-16 11:01:21,423 INFO L226 Difference]: Without dead ends: 662 [2022-11-16 11:01:21,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:01:21,425 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 2 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:21,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1589 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:01:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-11-16 11:01:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2022-11-16 11:01:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 640 states have (on average 1.2453125) internal successors, (797), 646 states have internal predecessors, (797), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-16 11:01:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 833 transitions. [2022-11-16 11:01:21,459 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 833 transitions. Word has length 185 [2022-11-16 11:01:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:21,460 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 833 transitions. [2022-11-16 11:01:21,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:01:21,460 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 833 transitions. [2022-11-16 11:01:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-11-16 11:01:21,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:21,463 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:21,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:21,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:01:21,690 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:01:21,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:21,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2122034318, now seen corresponding path program 1 times [2022-11-16 11:01:21,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:01:21,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982446681] [2022-11-16 11:01:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:21,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:01:21,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:01:21,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794576268] [2022-11-16 11:01:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:21,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:01:21,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:01:21,796 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:01:21,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5e6e3d-f2c8-4b33-bd2c-e25ac3fbb4cc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process