./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro --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 fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae --- 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-8393723 [2022-11-18 18:46:49,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:46:49,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:46:49,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:46:49,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:46:49,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:46:49,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:46:49,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:46:49,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:46:49,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:46:49,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:46:49,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:46:49,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:46:49,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:46:49,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:46:49,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:46:49,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:46:49,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:46:49,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:46:49,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:46:49,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:46:49,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:46:49,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:46:49,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:46:49,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:46:49,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:46:49,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:46:49,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:46:49,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:46:49,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:46:49,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:46:49,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:46:49,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:46:49,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:46:49,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:46:49,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:46:49,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:46:49,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:46:49,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:46:49,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:46:49,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:46:49,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:46:49,159 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:46:49,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:46:49,160 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:46:49,161 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:46:49,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:46:49,161 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:46:49,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:46:49,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:46:49,163 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:46:49,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:46:49,163 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:46:49,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:46:49,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:46:49,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:46:49,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:46:49,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:46:49,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:46:49,165 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:46:49,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:46:49,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:46:49,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:46:49,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:46:49,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:46:49,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:46:49,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:46:49,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:46:49,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:46:49,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:46:49,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:46:49,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:46:49,169 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:46:49,169 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:46:49,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:46:49,169 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_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae [2022-11-18 18:46:49,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:46:49,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:46:49,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:46:49,421 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:46:49,422 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:46:49,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2022-11-18 18:46:49,496 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/data/7bfe8c78f/5d0c86f1ca61426b8c2dedd1c11a73e1/FLAGd42eda4bb [2022-11-18 18:46:50,159 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:46:50,160 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2022-11-18 18:46:50,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/data/7bfe8c78f/5d0c86f1ca61426b8c2dedd1c11a73e1/FLAGd42eda4bb [2022-11-18 18:46:50,345 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/data/7bfe8c78f/5d0c86f1ca61426b8c2dedd1c11a73e1 [2022-11-18 18:46:50,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:46:50,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:46:50,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:46:50,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:46:50,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:46:50,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:46:50" (1/1) ... [2022-11-18 18:46:50,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc99888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:50, skipping insertion in model container [2022-11-18 18:46:50,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:46:50" (1/1) ... [2022-11-18 18:46:50,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:46:50,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:46:50,924 WARN L234 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_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2022-11-18 18:46:51,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:46:51,209 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:46:51,250 WARN L234 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_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2022-11-18 18:46:51,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:46:51,512 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:46:51,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51 WrapperNode [2022-11-18 18:46:51,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:46:51,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:46:51,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:46:51,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:46:51,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (1/1) ... [2022-11-18 18:46:51,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (1/1) ... [2022-11-18 18:46:51,681 INFO L138 Inliner]: procedures = 177, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2459 [2022-11-18 18:46:51,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:46:51,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:46:51,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:46:51,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:46:51,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (1/1) ... [2022-11-18 18:46:51,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (1/1) ... [2022-11-18 18:46:51,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (1/1) ... [2022-11-18 18:46:51,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (1/1) ... [2022-11-18 18:46:51,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (1/1) ... [2022-11-18 18:46:51,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (1/1) ... [2022-11-18 18:46:51,853 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (1/1) ... [2022-11-18 18:46:51,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (1/1) ... [2022-11-18 18:46:51,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:46:51,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:46:51,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:46:51,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:46:51,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (1/1) ... [2022-11-18 18:46:51,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:46:51,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:51,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:46:51,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:46:52,012 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-11-18 18:46:52,013 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-11-18 18:46:52,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:46:52,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 18:46:52,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 18:46:52,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:46:52,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-18 18:46:52,014 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-18 18:46:52,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 18:46:52,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:46:52,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 18:46:52,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:46:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-18 18:46:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 18:46:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:46:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:46:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:46:52,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:46:52,436 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:46:52,438 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:46:55,369 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:46:55,380 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:46:55,380 INFO L300 CfgBuilder]: Removed 168 assume(true) statements. [2022-11-18 18:46:55,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:46:55 BoogieIcfgContainer [2022-11-18 18:46:55,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:46:55,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:46:55,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:46:55,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:46:55,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:46:50" (1/3) ... [2022-11-18 18:46:55,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ecd4a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:46:55, skipping insertion in model container [2022-11-18 18:46:55,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:51" (2/3) ... [2022-11-18 18:46:55,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ecd4a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:46:55, skipping insertion in model container [2022-11-18 18:46:55,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:46:55" (3/3) ... [2022-11-18 18:46:55,394 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-3.i [2022-11-18 18:46:55,415 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:46:55,416 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:46:55,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:46:55,482 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;@69f9500, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:46:55,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 18:46:55,488 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) [2022-11-18 18:46:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:46:55,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:55,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:55,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:55,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:55,505 INFO L85 PathProgramCache]: Analyzing trace with hash 210225997, now seen corresponding path program 1 times [2022-11-18 18:46:55,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:55,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205154541] [2022-11-18 18:46:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:55,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:55,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:55,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205154541] [2022-11-18 18:46:55,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205154541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:55,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:55,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:46:55,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416489395] [2022-11-18 18:46:55,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:55,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:46:55,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:55,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:46:55,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:46:55,822 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) [2022-11-18 18:46:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:55,933 INFO L93 Difference]: Finished difference Result 946 states and 1622 transitions. [2022-11-18 18:46:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:46:55,936 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 [2022-11-18 18:46:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:55,952 INFO L225 Difference]: With dead ends: 946 [2022-11-18 18:46:55,952 INFO L226 Difference]: Without dead ends: 420 [2022-11-18 18:46:55,956 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 [2022-11-18 18:46:55,959 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 [2022-11-18 18:46:55,960 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] [2022-11-18 18:46:55,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-18 18:46:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2022-11-18 18:46:56,024 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) [2022-11-18 18:46:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 559 transitions. [2022-11-18 18:46:56,033 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 559 transitions. Word has length 13 [2022-11-18 18:46:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:56,033 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 559 transitions. [2022-11-18 18:46:56,033 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) [2022-11-18 18:46:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 559 transitions. [2022-11-18 18:46:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 18:46:56,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:56,036 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] [2022-11-18 18:46:56,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:46:56,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1084411649, now seen corresponding path program 1 times [2022-11-18 18:46:56,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:56,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248215051] [2022-11-18 18:46:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:56,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:56,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:56,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248215051] [2022-11-18 18:46:56,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248215051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:56,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:56,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:46:56,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566760141] [2022-11-18 18:46:56,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:56,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:56,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:56,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:56,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:56,580 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) [2022-11-18 18:46:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:57,381 INFO L93 Difference]: Finished difference Result 741 states and 991 transitions. [2022-11-18 18:46:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:46:57,382 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 [2022-11-18 18:46:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:57,385 INFO L225 Difference]: With dead ends: 741 [2022-11-18 18:46:57,386 INFO L226 Difference]: Without dead ends: 495 [2022-11-18 18:46:57,388 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 [2022-11-18 18:46:57,389 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 [2022-11-18 18:46:57,390 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] [2022-11-18 18:46:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-18 18:46:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 422. [2022-11-18 18:46:57,420 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) [2022-11-18 18:46:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 561 transitions. [2022-11-18 18:46:57,423 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 561 transitions. Word has length 48 [2022-11-18 18:46:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:57,423 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 561 transitions. [2022-11-18 18:46:57,424 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) [2022-11-18 18:46:57,424 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 561 transitions. [2022-11-18 18:46:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:46:57,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:57,428 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] [2022-11-18 18:46:57,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:46:57,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:57,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:57,430 INFO L85 PathProgramCache]: Analyzing trace with hash -371947318, now seen corresponding path program 1 times [2022-11-18 18:46:57,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:57,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948035151] [2022-11-18 18:46:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:57,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:57,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:46:57,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150724135] [2022-11-18 18:46:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:57,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:57,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:57,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:57,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:46:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:46:58,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:58,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:46:58,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:58,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948035151] [2022-11-18 18:46:58,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:46:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150724135] [2022-11-18 18:46:58,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150724135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:58,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:58,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721201405] [2022-11-18 18:46:58,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:46:58,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:58,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:46:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:46:58,729 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) [2022-11-18 18:46:58,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:58,819 INFO L93 Difference]: Finished difference Result 861 states and 1149 transitions. [2022-11-18 18:46:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:46:58,819 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 [2022-11-18 18:46:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:58,822 INFO L225 Difference]: With dead ends: 861 [2022-11-18 18:46:58,822 INFO L226 Difference]: Without dead ends: 443 [2022-11-18 18:46:58,823 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 [2022-11-18 18:46:58,824 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 [2022-11-18 18:46:58,825 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] [2022-11-18 18:46:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-18 18:46:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 442. [2022-11-18 18:46:58,843 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) [2022-11-18 18:46:58,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 581 transitions. [2022-11-18 18:46:58,846 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 581 transitions. Word has length 101 [2022-11-18 18:46:58,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:58,847 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 581 transitions. [2022-11-18 18:46:58,847 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) [2022-11-18 18:46:58,847 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 581 transitions. [2022-11-18 18:46:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:46:58,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:58,851 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] [2022-11-18 18:46:58,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:59,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:59,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:59,063 INFO L85 PathProgramCache]: Analyzing trace with hash -612187064, now seen corresponding path program 1 times [2022-11-18 18:46:59,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:59,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121335389] [2022-11-18 18:46:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:59,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:59,228 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:46:59,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737061845] [2022-11-18 18:46:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:59,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:59,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:59,231 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:59,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:47:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:00,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1679 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:47:00,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:00,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:00,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121335389] [2022-11-18 18:47:00,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:47:00,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737061845] [2022-11-18 18:47:00,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737061845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:00,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:00,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:47:00,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86275605] [2022-11-18 18:47:00,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:00,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:47:00,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:00,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:47:00,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:00,318 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) [2022-11-18 18:47:00,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:00,432 INFO L93 Difference]: Finished difference Result 697 states and 928 transitions. [2022-11-18 18:47:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:47:00,433 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 [2022-11-18 18:47:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:00,436 INFO L225 Difference]: With dead ends: 697 [2022-11-18 18:47:00,437 INFO L226 Difference]: Without dead ends: 463 [2022-11-18 18:47:00,438 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 [2022-11-18 18:47:00,439 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 [2022-11-18 18:47:00,440 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] [2022-11-18 18:47:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-18 18:47:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 462. [2022-11-18 18:47:00,458 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) [2022-11-18 18:47:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 601 transitions. [2022-11-18 18:47:00,461 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 601 transitions. Word has length 101 [2022-11-18 18:47:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:00,462 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 601 transitions. [2022-11-18 18:47:00,463 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) [2022-11-18 18:47:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 601 transitions. [2022-11-18 18:47:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:47:00,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:00,467 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] [2022-11-18 18:47:00,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:00,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:00,679 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:00,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1776324428, now seen corresponding path program 1 times [2022-11-18 18:47:00,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:00,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078298902] [2022-11-18 18:47:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:00,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:00,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:47:00,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128423240] [2022-11-18 18:47:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:00,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:00,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:00,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:00,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:47:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:01,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:47:01,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:01,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:01,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:01,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078298902] [2022-11-18 18:47:01,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:47:01,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128423240] [2022-11-18 18:47:01,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128423240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:01,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:01,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:47:01,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639117558] [2022-11-18 18:47:01,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:02,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:47:02,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:02,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:47:02,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:47:02,001 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) [2022-11-18 18:47:02,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:02,110 INFO L93 Difference]: Finished difference Result 994 states and 1299 transitions. [2022-11-18 18:47:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:47:02,111 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 [2022-11-18 18:47:02,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:02,114 INFO L225 Difference]: With dead ends: 994 [2022-11-18 18:47:02,114 INFO L226 Difference]: Without dead ends: 536 [2022-11-18 18:47:02,115 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 [2022-11-18 18:47:02,116 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 [2022-11-18 18:47:02,117 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] [2022-11-18 18:47:02,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-18 18:47:02,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 448. [2022-11-18 18:47:02,133 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) [2022-11-18 18:47:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 580 transitions. [2022-11-18 18:47:02,136 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 580 transitions. Word has length 101 [2022-11-18 18:47:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:02,136 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 580 transitions. [2022-11-18 18:47:02,136 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) [2022-11-18 18:47:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 580 transitions. [2022-11-18 18:47:02,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:47:02,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:02,140 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] [2022-11-18 18:47:02,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:02,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:02,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:02,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1464846374, now seen corresponding path program 1 times [2022-11-18 18:47:02,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:02,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647721887] [2022-11-18 18:47:02,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:02,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:02,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:47:02,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786259479] [2022-11-18 18:47:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:02,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:02,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:02,487 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:02,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:47:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:03,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1669 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:47:03,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:47:03,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:03,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:03,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647721887] [2022-11-18 18:47:03,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:47:03,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786259479] [2022-11-18 18:47:03,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786259479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:03,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:03,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:47:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840665575] [2022-11-18 18:47:03,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:03,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:47:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:47:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:47:03,633 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) [2022-11-18 18:47:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:03,745 INFO L93 Difference]: Finished difference Result 671 states and 876 transitions. [2022-11-18 18:47:03,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:47:03,745 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 [2022-11-18 18:47:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:03,748 INFO L225 Difference]: With dead ends: 671 [2022-11-18 18:47:03,748 INFO L226 Difference]: Without dead ends: 435 [2022-11-18 18:47:03,749 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 [2022-11-18 18:47:03,750 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 [2022-11-18 18:47:03,750 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] [2022-11-18 18:47:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-18 18:47:03,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 434. [2022-11-18 18:47:03,764 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) [2022-11-18 18:47:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 559 transitions. [2022-11-18 18:47:03,766 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 559 transitions. Word has length 101 [2022-11-18 18:47:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:03,767 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 559 transitions. [2022-11-18 18:47:03,767 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) [2022-11-18 18:47:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 559 transitions. [2022-11-18 18:47:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:47:03,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:03,769 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] [2022-11-18 18:47:03,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 18:47:03,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:03,982 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash -987630068, now seen corresponding path program 1 times [2022-11-18 18:47:03,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:03,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865673272] [2022-11-18 18:47:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:03,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:04,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:47:04,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314311961] [2022-11-18 18:47:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:04,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:04,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:04,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:04,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:47:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:05,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:47:05,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:05,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:05,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:05,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865673272] [2022-11-18 18:47:05,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:47:05,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314311961] [2022-11-18 18:47:05,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314311961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:05,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:05,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:47:05,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542915266] [2022-11-18 18:47:05,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:05,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:47:05,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:05,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:47:05,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:05,731 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) [2022-11-18 18:47:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:05,870 INFO L93 Difference]: Finished difference Result 1092 states and 1409 transitions. [2022-11-18 18:47:05,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:47:05,871 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 [2022-11-18 18:47:05,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:05,875 INFO L225 Difference]: With dead ends: 1092 [2022-11-18 18:47:05,876 INFO L226 Difference]: Without dead ends: 662 [2022-11-18 18:47:05,877 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 [2022-11-18 18:47:05,878 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 [2022-11-18 18:47:05,879 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] [2022-11-18 18:47:05,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-11-18 18:47:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 658. [2022-11-18 18:47:05,920 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) [2022-11-18 18:47:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 848 transitions. [2022-11-18 18:47:05,924 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 848 transitions. Word has length 101 [2022-11-18 18:47:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:05,925 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 848 transitions. [2022-11-18 18:47:05,925 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) [2022-11-18 18:47:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 848 transitions. [2022-11-18 18:47:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-18 18:47:05,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:05,935 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] [2022-11-18 18:47:05,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:06,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 18:47:06,149 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:06,149 INFO L85 PathProgramCache]: Analyzing trace with hash -263981483, now seen corresponding path program 1 times [2022-11-18 18:47:06,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:06,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894262877] [2022-11-18 18:47:06,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:06,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:06,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:47:06,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657096307] [2022-11-18 18:47:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:06,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:06,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:06,243 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:06,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:47:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:07,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:47:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:07,368 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 [2022-11-18 18:47:07,374 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 [2022-11-18 18:47:07,404 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:47:07,405 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 [2022-11-18 18:47:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:47:07,442 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 [2022-11-18 18:47:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:47:07,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:07,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:07,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894262877] [2022-11-18 18:47:07,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:47:07,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657096307] [2022-11-18 18:47:07,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657096307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:07,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:07,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:47:07,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075161166] [2022-11-18 18:47:07,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:07,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:47:07,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:07,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:47:07,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:47:07,463 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) [2022-11-18 18:47:08,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:08,790 INFO L93 Difference]: Finished difference Result 1228 states and 1581 transitions. [2022-11-18 18:47:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:47:08,791 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 [2022-11-18 18:47:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:08,794 INFO L225 Difference]: With dead ends: 1228 [2022-11-18 18:47:08,794 INFO L226 Difference]: Without dead ends: 658 [2022-11-18 18:47:08,796 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 [2022-11-18 18:47:08,796 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 97 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:08,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1819 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 18:47:08,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-11-18 18:47:08,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 658. [2022-11-18 18:47:08,829 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) [2022-11-18 18:47:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 847 transitions. [2022-11-18 18:47:08,862 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 847 transitions. Word has length 116 [2022-11-18 18:47:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:08,862 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 847 transitions. [2022-11-18 18:47:08,862 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) [2022-11-18 18:47:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 847 transitions. [2022-11-18 18:47:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-18 18:47:08,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:08,871 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] [2022-11-18 18:47:08,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:09,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 18:47:09,083 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1573589792, now seen corresponding path program 1 times [2022-11-18 18:47:09,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:09,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439210454] [2022-11-18 18:47:09,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:09,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:09,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:47:09,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461580688] [2022-11-18 18:47:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:09,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:09,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:09,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:09,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:47:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:10,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 2237 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:47:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:47:10,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:10,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:10,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439210454] [2022-11-18 18:47:10,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:47:10,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461580688] [2022-11-18 18:47:10,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461580688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:10,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:10,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:47:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778484946] [2022-11-18 18:47:10,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:10,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:47:10,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:10,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:47:10,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:10,734 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) [2022-11-18 18:47:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:10,829 INFO L93 Difference]: Finished difference Result 1340 states and 1735 transitions. [2022-11-18 18:47:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:47:10,829 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 [2022-11-18 18:47:10,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:10,832 INFO L225 Difference]: With dead ends: 1340 [2022-11-18 18:47:10,832 INFO L226 Difference]: Without dead ends: 700 [2022-11-18 18:47:10,834 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 [2022-11-18 18:47:10,834 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 [2022-11-18 18:47:10,835 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] [2022-11-18 18:47:10,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-18 18:47:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 698. [2022-11-18 18:47:10,857 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) [2022-11-18 18:47:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 887 transitions. [2022-11-18 18:47:10,860 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 887 transitions. Word has length 163 [2022-11-18 18:47:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:10,860 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 887 transitions. [2022-11-18 18:47:10,861 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) [2022-11-18 18:47:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 887 transitions. [2022-11-18 18:47:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-18 18:47:10,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:10,863 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] [2022-11-18 18:47:10,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 18:47:11,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:11,076 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:11,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:11,077 INFO L85 PathProgramCache]: Analyzing trace with hash -357535842, now seen corresponding path program 1 times [2022-11-18 18:47:11,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:11,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481363372] [2022-11-18 18:47:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:11,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:11,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:47:11,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564287051] [2022-11-18 18:47:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:11,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:11,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:11,269 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:11,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:47:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:13,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2239 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:47:13,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:47:13,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:13,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:13,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481363372] [2022-11-18 18:47:13,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:47:13,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564287051] [2022-11-18 18:47:13,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564287051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:13,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:13,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:47:13,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978440262] [2022-11-18 18:47:13,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:13,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:47:13,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:13,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:47:13,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:47:13,084 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) [2022-11-18 18:47:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:13,201 INFO L93 Difference]: Finished difference Result 1334 states and 1700 transitions. [2022-11-18 18:47:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:47:13,202 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 [2022-11-18 18:47:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:13,207 INFO L225 Difference]: With dead ends: 1334 [2022-11-18 18:47:13,207 INFO L226 Difference]: Without dead ends: 672 [2022-11-18 18:47:13,209 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 [2022-11-18 18:47:13,210 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 [2022-11-18 18:47:13,211 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] [2022-11-18 18:47:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-18 18:47:13,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 670. [2022-11-18 18:47:13,236 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) [2022-11-18 18:47:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 845 transitions. [2022-11-18 18:47:13,240 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 845 transitions. Word has length 163 [2022-11-18 18:47:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:13,240 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 845 transitions. [2022-11-18 18:47:13,241 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) [2022-11-18 18:47:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 845 transitions. [2022-11-18 18:47:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-18 18:47:13,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:13,244 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] [2022-11-18 18:47:13,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:13,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:13,459 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:13,460 INFO L85 PathProgramCache]: Analyzing trace with hash -509250644, now seen corresponding path program 1 times [2022-11-18 18:47:13,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:13,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157116098] [2022-11-18 18:47:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:13,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:13,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:47:13,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874615887] [2022-11-18 18:47:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:13,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:13,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:13,640 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:13,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:47:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:15,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 2225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:47:15,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:47:15,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:15,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157116098] [2022-11-18 18:47:15,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:47:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874615887] [2022-11-18 18:47:15,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874615887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:15,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:15,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:47:15,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077462842] [2022-11-18 18:47:15,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:15,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:47:15,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:47:15,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:15,573 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) [2022-11-18 18:47:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:15,688 INFO L93 Difference]: Finished difference Result 1521 states and 1944 transitions. [2022-11-18 18:47:15,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:47:15,688 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 [2022-11-18 18:47:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:15,693 INFO L225 Difference]: With dead ends: 1521 [2022-11-18 18:47:15,694 INFO L226 Difference]: Without dead ends: 909 [2022-11-18 18:47:15,695 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 [2022-11-18 18:47:15,696 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 [2022-11-18 18:47:15,696 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] [2022-11-18 18:47:15,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-18 18:47:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 807. [2022-11-18 18:47:15,731 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) [2022-11-18 18:47:15,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1027 transitions. [2022-11-18 18:47:15,734 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1027 transitions. Word has length 163 [2022-11-18 18:47:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:15,736 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1027 transitions. [2022-11-18 18:47:15,736 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) [2022-11-18 18:47:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1027 transitions. [2022-11-18 18:47:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-18 18:47:15,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:15,740 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] [2022-11-18 18:47:15,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:15,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:15,961 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash 936600271, now seen corresponding path program 1 times [2022-11-18 18:47:15,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:15,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588258535] [2022-11-18 18:47:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:15,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:16,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:47:16,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113515732] [2022-11-18 18:47:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:16,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:16,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:16,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:16,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:47:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:17,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:47:17,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 18:47:18,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:47:18,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:18,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588258535] [2022-11-18 18:47:18,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:47:18,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113515732] [2022-11-18 18:47:18,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113515732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:18,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:18,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:47:18,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922175189] [2022-11-18 18:47:18,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:18,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:47:18,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:47:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:47:18,121 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) [2022-11-18 18:47:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:18,784 INFO L93 Difference]: Finished difference Result 1332 states and 1701 transitions. [2022-11-18 18:47:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:47:18,784 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 [2022-11-18 18:47:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:18,788 INFO L225 Difference]: With dead ends: 1332 [2022-11-18 18:47:18,788 INFO L226 Difference]: Without dead ends: 659 [2022-11-18 18:47:18,790 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 [2022-11-18 18:47:18,790 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 823 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:18,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 635 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 18:47:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-11-18 18:47:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2022-11-18 18:47:18,821 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) [2022-11-18 18:47:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 827 transitions. [2022-11-18 18:47:18,824 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 827 transitions. Word has length 178 [2022-11-18 18:47:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:18,825 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 827 transitions. [2022-11-18 18:47:18,825 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) [2022-11-18 18:47:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 827 transitions. [2022-11-18 18:47:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-18 18:47:18,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:18,829 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] [2022-11-18 18:47:18,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:19,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:19,042 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:19,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:19,043 INFO L85 PathProgramCache]: Analyzing trace with hash 105070510, now seen corresponding path program 1 times [2022-11-18 18:47:19,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:19,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112204530] [2022-11-18 18:47:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:19,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:19,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:47:19,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072998979] [2022-11-18 18:47:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:19,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:19,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:19,149 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:19,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:50:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:50:11,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 18:50:11,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:50:11,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:11,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112204530] [2022-11-18 18:50:11,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:50:11,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072998979] [2022-11-18 18:50:11,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072998979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:50:11,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:50:11,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:50:11,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118231872] [2022-11-18 18:50:11,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:50:11,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:50:11,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:11,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:50:11,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:50:11,764 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) [2022-11-18 18:50:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:11,840 INFO L93 Difference]: Finished difference Result 1269 states and 1606 transitions. [2022-11-18 18:50:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:50:11,841 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 [2022-11-18 18:50:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:11,845 INFO L225 Difference]: With dead ends: 1269 [2022-11-18 18:50:11,845 INFO L226 Difference]: Without dead ends: 662 [2022-11-18 18:50:11,846 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 [2022-11-18 18:50:11,848 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 [2022-11-18 18:50:11,848 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] [2022-11-18 18:50:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-11-18 18:50:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2022-11-18 18:50:11,879 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) [2022-11-18 18:50:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 833 transitions. [2022-11-18 18:50:11,883 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 833 transitions. Word has length 185 [2022-11-18 18:50:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:11,883 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 833 transitions. [2022-11-18 18:50:11,884 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) [2022-11-18 18:50:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 833 transitions. [2022-11-18 18:50:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-11-18 18:50:11,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:11,887 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] [2022-11-18 18:50:11,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:12,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:50:12,115 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:50:12,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:12,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2122034318, now seen corresponding path program 1 times [2022-11-18 18:50:12,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:12,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577536413] [2022-11-18 18:50:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:12,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:12,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:50:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866691486] [2022-11-18 18:50:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:12,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:12,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:12,216 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:12,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed72d01-ddce-4b59-8e63-b63c17b3a04e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process