./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:47:06,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:47:06,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:47:06,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:47:06,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:47:06,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:47:06,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:47:06,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:47:06,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:47:06,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:47:06,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:47:06,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:47:06,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:47:06,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:47:06,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:47:06,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:47:06,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:47:06,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:47:06,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:47:06,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:47:06,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:47:06,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:47:06,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:47:06,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:47:06,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:47:06,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:47:06,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:47:06,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:47:06,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:47:06,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:47:06,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:47:06,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:47:06,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:47:06,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:47:06,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:47:06,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:47:06,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:47:06,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:47:06,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:47:06,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:47:06,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:47:06,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 11:47:06,351 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:47:06,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:47:06,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:47:06,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:47:06,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:47:06,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:47:06,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:47:06,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:47:06,355 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:47:06,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:47:06,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:47:06,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:47:06,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:47:06,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:47:06,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:47:06,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:47:06,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:47:06,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:47:06,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:47:06,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:47:06,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:47:06,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:47:06,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:47:06,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:47:06,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:47:06,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:47:06,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:47:06,360 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:47:06,360 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:47:06,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:47:06,362 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_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 [2022-11-16 11:47:06,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:47:06,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:47:06,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:47:06,746 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:47:06,747 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:47:06,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2022-11-16 11:47:06,838 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/data/380c02ad7/662f20e4d9ea4318b56d021e2fbf9e01/FLAG5ebdf516a [2022-11-16 11:47:07,653 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:47:07,654 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2022-11-16 11:47:07,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/data/380c02ad7/662f20e4d9ea4318b56d021e2fbf9e01/FLAG5ebdf516a [2022-11-16 11:47:08,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/data/380c02ad7/662f20e4d9ea4318b56d021e2fbf9e01 [2022-11-16 11:47:08,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:47:08,196 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:47:08,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:47:08,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:47:08,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:47:08,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:47:08" (1/1) ... [2022-11-16 11:47:08,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f91e237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:08, skipping insertion in model container [2022-11-16 11:47:08,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:47:08" (1/1) ... [2022-11-16 11:47:08,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:47:08,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:47:09,975 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2022-11-16 11:47:10,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:47:10,057 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:47:10,551 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2022-11-16 11:47:10,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:47:10,631 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:47:10,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10 WrapperNode [2022-11-16 11:47:10,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:47:10,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:47:10,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:47:10,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:47:10,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (1/1) ... [2022-11-16 11:47:10,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (1/1) ... [2022-11-16 11:47:10,900 INFO L138 Inliner]: procedures = 186, calls = 1553, calls flagged for inlining = 91, calls inlined = 88, statements flattened = 4258 [2022-11-16 11:47:10,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:47:10,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:47:10,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:47:10,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:47:10,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (1/1) ... [2022-11-16 11:47:10,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (1/1) ... [2022-11-16 11:47:10,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (1/1) ... [2022-11-16 11:47:10,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (1/1) ... [2022-11-16 11:47:11,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (1/1) ... [2022-11-16 11:47:11,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (1/1) ... [2022-11-16 11:47:11,131 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (1/1) ... [2022-11-16 11:47:11,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (1/1) ... [2022-11-16 11:47:11,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:47:11,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:47:11,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:47:11,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:47:11,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (1/1) ... [2022-11-16 11:47:11,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:47:11,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:11,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:47:11,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:47:11,287 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_sw [2022-11-16 11:47:11,288 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_sw [2022-11-16 11:47:11,288 INFO L130 BoogieDeclarations]: Found specification of procedure snd_card_file_remove [2022-11-16 11:47:11,288 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_card_file_remove [2022-11-16 11:47:11,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-16 11:47:11,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-16 11:47:11,289 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-16 11:47:11,289 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_recsrc2 [2022-11-16 11:47:11,289 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_recsrc2 [2022-11-16 11:47:11,289 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_find_numid [2022-11-16 11:47:11,289 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_find_numid [2022-11-16 11:47:11,289 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv [2022-11-16 11:47:11,290 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv [2022-11-16 11:47:11,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:47:11,290 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-16 11:47:11,290 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-16 11:47:11,291 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_input [2022-11-16 11:47:11,291 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_input [2022-11-16 11:47:11,291 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 11:47:11,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 11:47:11,291 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-16 11:47:11,292 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-16 11:47:11,292 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-16 11:47:11,292 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_test_id [2022-11-16 11:47:11,292 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_test_id [2022-11-16 11:47:11,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:47:11,293 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-16 11:47:11,293 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-16 11:47:11,293 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2022-11-16 11:47:11,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2022-11-16 11:47:11,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-16 11:47:11,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-16 11:47:11,294 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_vol [2022-11-16 11:47:11,294 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_vol [2022-11-16 11:47:11,294 INFO L130 BoogieDeclarations]: Found specification of procedure snd_info_free_entry [2022-11-16 11:47:11,294 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_info_free_entry [2022-11-16 11:47:11,294 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-16 11:47:11,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-16 11:47:11,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-16 11:47:11,295 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-16 11:47:11,295 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_release [2022-11-16 11:47:11,296 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_release [2022-11-16 11:47:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:47:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv2 [2022-11-16 11:47:11,296 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv2 [2022-11-16 11:47:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv1 [2022-11-16 11:47:11,296 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv1 [2022-11-16 11:47:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-11-16 11:47:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure up_read [2022-11-16 11:47:11,297 INFO L138 BoogieDeclarations]: Found implementation of procedure up_read [2022-11-16 11:47:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:47:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_held [2022-11-16 11:47:11,298 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_held [2022-11-16 11:47:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-11-16 11:47:11,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-11-16 11:47:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:47:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 11:47:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-16 11:47:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure mixer_slot_clear [2022-11-16 11:47:11,302 INFO L138 BoogieDeclarations]: Found implementation of procedure mixer_slot_clear [2022-11-16 11:47:11,302 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_notify [2022-11-16 11:47:11,302 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_notify [2022-11-16 11:47:11,303 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-16 11:47:11,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-16 11:47:11,303 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_ioctl1 [2022-11-16 11:47:11,304 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_ioctl1 [2022-11-16 11:47:11,304 INFO L130 BoogieDeclarations]: Found specification of procedure down_read [2022-11-16 11:47:11,304 INFO L138 BoogieDeclarations]: Found implementation of procedure down_read [2022-11-16 11:47:11,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_down_read_controls_rwsem_of_snd_card [2022-11-16 11:47:11,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_down_read_controls_rwsem_of_snd_card [2022-11-16 11:47:11,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 11:47:11,305 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-11-16 11:47:11,306 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-11-16 11:47:11,306 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-16 11:47:11,306 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-16 11:47:11,306 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_sw [2022-11-16 11:47:11,307 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_sw [2022-11-16 11:47:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_up_read_controls_rwsem_of_snd_card [2022-11-16 11:47:11,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_up_read_controls_rwsem_of_snd_card [2022-11-16 11:47:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:47:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 11:47:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_test [2022-11-16 11:47:11,308 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_test [2022-11-16 11:47:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-11-16 11:47:11,308 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-11-16 11:47:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-16 11:47:11,308 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-16 11:47:11,309 INFO L130 BoogieDeclarations]: Found specification of procedure snd_oss_info_register [2022-11-16 11:47:11,309 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_oss_info_register [2022-11-16 11:47:11,309 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_vol [2022-11-16 11:47:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_vol [2022-11-16 11:47:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_notify_handler [2022-11-16 11:47:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_notify_handler [2022-11-16 11:47:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-16 11:47:11,311 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-16 11:47:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-16 11:47:11,312 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-16 11:47:11,312 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-16 11:47:11,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-16 11:47:11,313 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_dereference [2022-11-16 11:47:11,314 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_dereference [2022-11-16 11:47:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_open [2022-11-16 11:47:11,314 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_open [2022-11-16 11:47:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:47:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-11-16 11:47:11,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-11-16 11:47:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:47:11,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:47:12,089 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:47:12,095 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:47:24,989 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:47:25,022 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:47:25,023 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:47:25,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:47:25 BoogieIcfgContainer [2022-11-16 11:47:25,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:47:25,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:47:25,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:47:25,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:47:25,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:47:08" (1/3) ... [2022-11-16 11:47:25,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e418b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:47:25, skipping insertion in model container [2022-11-16 11:47:25,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:10" (2/3) ... [2022-11-16 11:47:25,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e418b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:47:25, skipping insertion in model container [2022-11-16 11:47:25,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:47:25" (3/3) ... [2022-11-16 11:47:25,047 INFO L112 eAbstractionObserver]: Analyzing ICFG m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2022-11-16 11:47:25,069 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:47:25,071 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:47:25,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:47:25,204 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;@710c0f25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:47:25,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:47:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 1205 states, 902 states have (on average 1.4722838137472283) internal successors, (1328), 919 states have internal predecessors, (1328), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) [2022-11-16 11:47:25,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:47:25,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:25,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:25,234 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:25,246 INFO L85 PathProgramCache]: Analyzing trace with hash -799125629, now seen corresponding path program 1 times [2022-11-16 11:47:25,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:25,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261257051] [2022-11-16 11:47:25,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:25,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:25,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:47:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:25,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261257051] [2022-11-16 11:47:25,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261257051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:47:25,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:47:25,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:47:25,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166270577] [2022-11-16 11:47:25,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:47:25,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:47:25,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:25,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:47:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:47:26,002 INFO L87 Difference]: Start difference. First operand has 1205 states, 902 states have (on average 1.4722838137472283) internal successors, (1328), 919 states have internal predecessors, (1328), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:47:26,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:26,290 INFO L93 Difference]: Finished difference Result 2350 states and 3707 transitions. [2022-11-16 11:47:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:47:26,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-16 11:47:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:26,317 INFO L225 Difference]: With dead ends: 2350 [2022-11-16 11:47:26,317 INFO L226 Difference]: Without dead ends: 1146 [2022-11-16 11:47:26,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:47:26,343 INFO L413 NwaCegarLoop]: 1727 mSDtfsCounter, 5 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3451 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:26,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3451 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:47:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-11-16 11:47:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1141. [2022-11-16 11:47:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 849 states have (on average 1.4558303886925794) internal successors, (1236), 862 states have internal predecessors, (1236), 247 states have call successors, (247), 45 states have call predecessors, (247), 44 states have return successors, (244), 244 states have call predecessors, (244), 244 states have call successors, (244) [2022-11-16 11:47:26,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1727 transitions. [2022-11-16 11:47:26,596 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1727 transitions. Word has length 14 [2022-11-16 11:47:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:26,597 INFO L495 AbstractCegarLoop]: Abstraction has 1141 states and 1727 transitions. [2022-11-16 11:47:26,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:47:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1727 transitions. [2022-11-16 11:47:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:47:26,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:26,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:26,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:47:26,600 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:26,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1677097618, now seen corresponding path program 1 times [2022-11-16 11:47:26,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:26,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803654611] [2022-11-16 11:47:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:26,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:26,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:47:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:26,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:26,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803654611] [2022-11-16 11:47:26,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803654611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:26,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055119757] [2022-11-16 11:47:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:26,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:26,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:27,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:27,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:47:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:27,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:47:27,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:27,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:27,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055119757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:27,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:27,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:47:27,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010820092] [2022-11-16 11:47:27,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:27,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:47:27,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:27,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:47:27,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:47:27,915 INFO L87 Difference]: Start difference. First operand 1141 states and 1727 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:47:28,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:28,148 INFO L93 Difference]: Finished difference Result 2288 states and 3465 transitions. [2022-11-16 11:47:28,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:47:28,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-16 11:47:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:28,160 INFO L225 Difference]: With dead ends: 2288 [2022-11-16 11:47:28,161 INFO L226 Difference]: Without dead ends: 1159 [2022-11-16 11:47:28,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:47:28,169 INFO L413 NwaCegarLoop]: 1725 mSDtfsCounter, 36 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3449 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:28,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 3449 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:47:28,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-11-16 11:47:28,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1159. [2022-11-16 11:47:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 864 states have (on average 1.4513888888888888) internal successors, (1254), 877 states have internal predecessors, (1254), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2022-11-16 11:47:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1751 transitions. [2022-11-16 11:47:28,252 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1751 transitions. Word has length 18 [2022-11-16 11:47:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:28,253 INFO L495 AbstractCegarLoop]: Abstraction has 1159 states and 1751 transitions. [2022-11-16 11:47:28,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:47:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1751 transitions. [2022-11-16 11:47:28,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:47:28,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:28,264 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:28,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:28,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:28,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash 2118424111, now seen corresponding path program 2 times [2022-11-16 11:47:28,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:28,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201609217] [2022-11-16 11:47:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:28,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:28,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:47:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:47:28,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:28,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201609217] [2022-11-16 11:47:28,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201609217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:47:28,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:47:28,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:47:28,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237999430] [2022-11-16 11:47:28,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:47:28,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:47:28,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:28,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:47:28,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:47:28,736 INFO L87 Difference]: Start difference. First operand 1159 states and 1751 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:47:28,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:28,863 INFO L93 Difference]: Finished difference Result 1164 states and 1755 transitions. [2022-11-16 11:47:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:47:28,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-11-16 11:47:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:28,872 INFO L225 Difference]: With dead ends: 1164 [2022-11-16 11:47:28,872 INFO L226 Difference]: Without dead ends: 1159 [2022-11-16 11:47:28,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:47:28,875 INFO L413 NwaCegarLoop]: 1723 mSDtfsCounter, 75 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 5078 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:28,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 5078 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:47:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-11-16 11:47:28,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1159. [2022-11-16 11:47:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 864 states have (on average 1.4502314814814814) internal successors, (1253), 877 states have internal predecessors, (1253), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2022-11-16 11:47:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1750 transitions. [2022-11-16 11:47:28,930 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1750 transitions. Word has length 30 [2022-11-16 11:47:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:28,931 INFO L495 AbstractCegarLoop]: Abstraction has 1159 states and 1750 transitions. [2022-11-16 11:47:28,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:47:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1750 transitions. [2022-11-16 11:47:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 11:47:28,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:28,934 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] [2022-11-16 11:47:28,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:47:28,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash -123680943, now seen corresponding path program 1 times [2022-11-16 11:47:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:28,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187160045] [2022-11-16 11:47:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:28,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:29,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:47:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:29,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 11:47:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:47:29,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:29,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187160045] [2022-11-16 11:47:29,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187160045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:47:29,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:47:29,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:47:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198640500] [2022-11-16 11:47:29,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:47:29,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:47:29,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:29,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:47:29,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:47:29,201 INFO L87 Difference]: Start difference. First operand 1159 states and 1750 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:47:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:29,291 INFO L93 Difference]: Finished difference Result 1171 states and 1764 transitions. [2022-11-16 11:47:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:47:29,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-11-16 11:47:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:29,300 INFO L225 Difference]: With dead ends: 1171 [2022-11-16 11:47:29,300 INFO L226 Difference]: Without dead ends: 1165 [2022-11-16 11:47:29,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:47:29,303 INFO L413 NwaCegarLoop]: 1723 mSDtfsCounter, 5 mSDsluCounter, 1719 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:29,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3442 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:47:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-11-16 11:47:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1160. [2022-11-16 11:47:29,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 865 states have (on average 1.4497109826589596) internal successors, (1254), 878 states have internal predecessors, (1254), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2022-11-16 11:47:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1751 transitions. [2022-11-16 11:47:29,358 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1751 transitions. Word has length 38 [2022-11-16 11:47:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:29,358 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1751 transitions. [2022-11-16 11:47:29,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:47:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1751 transitions. [2022-11-16 11:47:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 11:47:29,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:29,361 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] [2022-11-16 11:47:29,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:47:29,362 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:29,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1577997882, now seen corresponding path program 1 times [2022-11-16 11:47:29,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:29,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339293882] [2022-11-16 11:47:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:29,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:29,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:47:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:29,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 11:47:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 11:47:29,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:29,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339293882] [2022-11-16 11:47:29,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339293882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:47:29,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:47:29,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:47:29,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789722558] [2022-11-16 11:47:29,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:47:29,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:47:29,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:47:29,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:47:29,631 INFO L87 Difference]: Start difference. First operand 1160 states and 1751 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:47:30,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:30,082 INFO L93 Difference]: Finished difference Result 1949 states and 2978 transitions. [2022-11-16 11:47:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:47:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-11-16 11:47:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:30,099 INFO L225 Difference]: With dead ends: 1949 [2022-11-16 11:47:30,099 INFO L226 Difference]: Without dead ends: 1942 [2022-11-16 11:47:30,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:47:30,102 INFO L413 NwaCegarLoop]: 1853 mSDtfsCounter, 1135 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 3565 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:30,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 3565 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:47:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2022-11-16 11:47:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1940. [2022-11-16 11:47:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1488 states have (on average 1.4637096774193548) internal successors, (2178), 1510 states have internal predecessors, (2178), 376 states have call successors, (376), 78 states have call predecessors, (376), 75 states have return successors, (414), 366 states have call predecessors, (414), 373 states have call successors, (414) [2022-11-16 11:47:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 2968 transitions. [2022-11-16 11:47:30,284 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 2968 transitions. Word has length 42 [2022-11-16 11:47:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:30,290 INFO L495 AbstractCegarLoop]: Abstraction has 1940 states and 2968 transitions. [2022-11-16 11:47:30,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:47:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 2968 transitions. [2022-11-16 11:47:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 11:47:30,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:30,298 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-11-16 11:47:30,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:47:30,298 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:30,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:30,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1067053923, now seen corresponding path program 1 times [2022-11-16 11:47:30,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:30,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129595654] [2022-11-16 11:47:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:30,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:31,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:47:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:31,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-16 11:47:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:31,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 11:47:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:31,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 11:47:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:31,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 11:47:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:31,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 11:47:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:31,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-16 11:47:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:31,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:47:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 11:47:31,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:31,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129595654] [2022-11-16 11:47:31,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129595654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:47:31,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:47:31,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 11:47:31,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944967942] [2022-11-16 11:47:31,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:47:31,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:47:31,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:31,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:47:31,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:47:31,440 INFO L87 Difference]: Start difference. First operand 1940 states and 2968 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 11:47:35,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:57,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:57,598 INFO L93 Difference]: Finished difference Result 4540 states and 7217 transitions. [2022-11-16 11:47:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:47:57,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 89 [2022-11-16 11:47:57,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:57,625 INFO L225 Difference]: With dead ends: 4540 [2022-11-16 11:47:57,626 INFO L226 Difference]: Without dead ends: 2655 [2022-11-16 11:47:57,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:47:57,649 INFO L413 NwaCegarLoop]: 1473 mSDtfsCounter, 2586 mSDsluCounter, 8855 mSDsCounter, 0 mSdLazyCounter, 6355 mSolverCounterSat, 993 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2732 SdHoareTripleChecker+Valid, 10328 SdHoareTripleChecker+Invalid, 7349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 6355 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:57,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2732 Valid, 10328 Invalid, 7349 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [993 Valid, 6355 Invalid, 1 Unknown, 0 Unchecked, 24.5s Time] [2022-11-16 11:47:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2022-11-16 11:47:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2179. [2022-11-16 11:47:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 1678 states have (on average 1.4529201430274137) internal successors, (2438), 1698 states have internal predecessors, (2438), 415 states have call successors, (415), 78 states have call predecessors, (415), 85 states have return successors, (531), 417 states have call predecessors, (531), 412 states have call successors, (531) [2022-11-16 11:47:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 3384 transitions. [2022-11-16 11:47:57,845 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 3384 transitions. Word has length 89 [2022-11-16 11:47:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:57,846 INFO L495 AbstractCegarLoop]: Abstraction has 2179 states and 3384 transitions. [2022-11-16 11:47:57,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 11:47:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 3384 transitions. [2022-11-16 11:47:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 11:47:57,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:57,852 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-11-16 11:47:57,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:47:57,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:57,854 INFO L85 PathProgramCache]: Analyzing trace with hash 802984909, now seen corresponding path program 1 times [2022-11-16 11:47:57,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:57,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250602080] [2022-11-16 11:47:57,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:57,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:58,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:47:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:58,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-16 11:47:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:58,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 11:47:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:58,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 11:47:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:58,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-16 11:47:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:58,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 11:47:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:58,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 11:47:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:58,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:47:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:47:58,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:58,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250602080] [2022-11-16 11:47:58,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250602080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:58,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613157706] [2022-11-16 11:47:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:58,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:58,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:58,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:58,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:47:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:59,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:47:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:47:59,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:48:00,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613157706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:00,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:00,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-11-16 11:48:00,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584668203] [2022-11-16 11:48:00,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:00,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:48:00,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:00,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:48:00,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:48:00,012 INFO L87 Difference]: Start difference. First operand 2179 states and 3384 transitions. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 11:48:03,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:48:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:15,144 INFO L93 Difference]: Finished difference Result 4847 states and 7741 transitions. [2022-11-16 11:48:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:48:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2022-11-16 11:48:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:15,167 INFO L225 Difference]: With dead ends: 4847 [2022-11-16 11:48:15,168 INFO L226 Difference]: Without dead ends: 2719 [2022-11-16 11:48:15,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:48:15,184 INFO L413 NwaCegarLoop]: 1476 mSDtfsCounter, 1855 mSDsluCounter, 4047 mSDsCounter, 0 mSdLazyCounter, 3148 mSolverCounterSat, 904 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 5523 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 3148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:15,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1966 Valid, 5523 Invalid, 4053 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [904 Valid, 3148 Invalid, 1 Unknown, 0 Unchecked, 14.7s Time] [2022-11-16 11:48:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2022-11-16 11:48:15,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2251. [2022-11-16 11:48:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 1738 states have (on average 1.4441887226697354) internal successors, (2510), 1758 states have internal predecessors, (2510), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2022-11-16 11:48:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 3492 transitions. [2022-11-16 11:48:15,359 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 3492 transitions. Word has length 88 [2022-11-16 11:48:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:15,360 INFO L495 AbstractCegarLoop]: Abstraction has 2251 states and 3492 transitions. [2022-11-16 11:48:15,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 11:48:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 3492 transitions. [2022-11-16 11:48:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-16 11:48:15,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:15,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-16 11:48:15,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:15,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:15,573 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:15,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1019558139, now seen corresponding path program 1 times [2022-11-16 11:48:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:15,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463680667] [2022-11-16 11:48:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:15,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:48:15,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911701956] [2022-11-16 11:48:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:15,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:15,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:15,735 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:15,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:48:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:16,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 3211 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:48:16,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:48:16,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:48:16,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:16,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463680667] [2022-11-16 11:48:16,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:48:16,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911701956] [2022-11-16 11:48:16,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911701956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:16,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:16,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:48:16,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792761319] [2022-11-16 11:48:16,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:16,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:48:16,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:48:16,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:48:16,918 INFO L87 Difference]: Start difference. First operand 2251 states and 3492 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-16 11:48:18,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:48:19,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:19,235 INFO L93 Difference]: Finished difference Result 4497 states and 7027 transitions. [2022-11-16 11:48:19,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:48:19,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 96 [2022-11-16 11:48:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:19,256 INFO L225 Difference]: With dead ends: 4497 [2022-11-16 11:48:19,256 INFO L226 Difference]: Without dead ends: 2255 [2022-11-16 11:48:19,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:48:19,271 INFO L413 NwaCegarLoop]: 1723 mSDtfsCounter, 1 mSDsluCounter, 1720 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3443 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:19,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3443 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 11:48:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2022-11-16 11:48:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 2253. [2022-11-16 11:48:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 1740 states have (on average 1.4436781609195402) internal successors, (2512), 1760 states have internal predecessors, (2512), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2022-11-16 11:48:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 3494 transitions. [2022-11-16 11:48:19,433 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 3494 transitions. Word has length 96 [2022-11-16 11:48:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:19,434 INFO L495 AbstractCegarLoop]: Abstraction has 2253 states and 3494 transitions. [2022-11-16 11:48:19,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-16 11:48:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 3494 transitions. [2022-11-16 11:48:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-16 11:48:19,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:19,446 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:19,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:19,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:19,659 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:19,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:19,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1617409406, now seen corresponding path program 1 times [2022-11-16 11:48:19,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:19,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162722563] [2022-11-16 11:48:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:19,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:19,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:48:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177288358] [2022-11-16 11:48:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:19,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:19,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:19,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:19,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:48:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:20,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:48:20,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:48:21,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:48:21,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:21,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162722563] [2022-11-16 11:48:21,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:48:21,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177288358] [2022-11-16 11:48:21,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177288358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:21,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:48:21,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-16 11:48:21,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702454852] [2022-11-16 11:48:21,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:21,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:48:21,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:48:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:48:21,227 INFO L87 Difference]: Start difference. First operand 2253 states and 3494 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 11:48:23,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:48:25,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:48:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:25,545 INFO L93 Difference]: Finished difference Result 4509 states and 7043 transitions. [2022-11-16 11:48:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:48:25,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 94 [2022-11-16 11:48:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:25,565 INFO L225 Difference]: With dead ends: 4509 [2022-11-16 11:48:25,565 INFO L226 Difference]: Without dead ends: 2265 [2022-11-16 11:48:25,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:48:25,581 INFO L413 NwaCegarLoop]: 1723 mSDtfsCounter, 6 mSDsluCounter, 3440 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5163 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:25,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 5163 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-11-16 11:48:25,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2022-11-16 11:48:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2265. [2022-11-16 11:48:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 1752 states have (on average 1.4406392694063928) internal successors, (2524), 1772 states have internal predecessors, (2524), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2022-11-16 11:48:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 3506 transitions. [2022-11-16 11:48:25,754 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 3506 transitions. Word has length 94 [2022-11-16 11:48:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:25,754 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 3506 transitions. [2022-11-16 11:48:25,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 11:48:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 3506 transitions. [2022-11-16 11:48:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-16 11:48:25,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:25,761 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2022-11-16 11:48:25,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:25,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:25,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:25,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:25,975 INFO L85 PathProgramCache]: Analyzing trace with hash -902042987, now seen corresponding path program 1 times [2022-11-16 11:48:25,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:25,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055228704] [2022-11-16 11:48:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:25,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:26,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:48:26,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183397269] [2022-11-16 11:48:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:26,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:26,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:26,138 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:26,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:48:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 3271 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:48:27,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:48:27,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:48:27,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:27,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055228704] [2022-11-16 11:48:27,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:48:27,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183397269] [2022-11-16 11:48:27,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183397269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:27,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:48:27,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-16 11:48:27,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146963712] [2022-11-16 11:48:27,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:27,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:48:27,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:27,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:48:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:48:27,939 INFO L87 Difference]: Start difference. First operand 2265 states and 3506 transitions. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 11:48:30,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:48:32,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:48:32,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:32,308 INFO L93 Difference]: Finished difference Result 4545 states and 7085 transitions. [2022-11-16 11:48:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:48:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 104 [2022-11-16 11:48:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:32,328 INFO L225 Difference]: With dead ends: 4545 [2022-11-16 11:48:32,328 INFO L226 Difference]: Without dead ends: 2289 [2022-11-16 11:48:32,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:48:32,344 INFO L413 NwaCegarLoop]: 1723 mSDtfsCounter, 15 mSDsluCounter, 6880 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8603 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:32,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8603 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-11-16 11:48:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2022-11-16 11:48:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2022-11-16 11:48:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 1776 states have (on average 1.4346846846846846) internal successors, (2548), 1796 states have internal predecessors, (2548), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2022-11-16 11:48:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3530 transitions. [2022-11-16 11:48:32,488 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3530 transitions. Word has length 104 [2022-11-16 11:48:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:32,489 INFO L495 AbstractCegarLoop]: Abstraction has 2289 states and 3530 transitions. [2022-11-16 11:48:32,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 11:48:32,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3530 transitions. [2022-11-16 11:48:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 11:48:32,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:32,495 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:32,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:32,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:48:32,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:32,709 INFO L85 PathProgramCache]: Analyzing trace with hash -587927870, now seen corresponding path program 2 times [2022-11-16 11:48:32,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:32,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739407197] [2022-11-16 11:48:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:32,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:48:32,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533954713] [2022-11-16 11:48:32,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:48:32,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:32,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:32,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:32,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:48:37,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:48:37,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:37,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2974 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:48:37,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-16 11:48:37,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:48:37,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:37,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739407197] [2022-11-16 11:48:37,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:48:37,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533954713] [2022-11-16 11:48:37,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533954713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:37,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:37,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:48:37,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060070899] [2022-11-16 11:48:37,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:37,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:48:37,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:37,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:48:37,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:48:37,988 INFO L87 Difference]: Start difference. First operand 2289 states and 3530 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-16 11:48:40,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:48:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:40,337 INFO L93 Difference]: Finished difference Result 4577 states and 7128 transitions. [2022-11-16 11:48:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:48:40,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2022-11-16 11:48:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:40,356 INFO L225 Difference]: With dead ends: 4577 [2022-11-16 11:48:40,356 INFO L226 Difference]: Without dead ends: 2297 [2022-11-16 11:48:40,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:48:40,372 INFO L413 NwaCegarLoop]: 1727 mSDtfsCounter, 5 mSDsluCounter, 3432 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 5159 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:40,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 5159 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-16 11:48:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2022-11-16 11:48:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 2293. [2022-11-16 11:48:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 1780 states have (on average 1.4337078651685393) internal successors, (2552), 1800 states have internal predecessors, (2552), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2022-11-16 11:48:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3534 transitions. [2022-11-16 11:48:40,517 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3534 transitions. Word has length 112 [2022-11-16 11:48:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:40,517 INFO L495 AbstractCegarLoop]: Abstraction has 2293 states and 3534 transitions. [2022-11-16 11:48:40,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-16 11:48:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3534 transitions. [2022-11-16 11:48:40,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 11:48:40,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:40,523 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2022-11-16 11:48:40,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:40,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:40,739 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:40,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1953759823, now seen corresponding path program 2 times [2022-11-16 11:48:40,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:40,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467026924] [2022-11-16 11:48:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:40,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:42,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:48:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:42,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-16 11:48:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:42,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 11:48:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:42,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 11:48:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:42,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 11:48:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:42,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-16 11:48:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:42,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-16 11:48:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:42,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:48:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:48:42,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:42,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467026924] [2022-11-16 11:48:42,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467026924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:42,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934226381] [2022-11-16 11:48:42,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:48:42,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:42,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:42,340 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:42,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:48:43,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:48:43,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:43,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:48:43,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-11-16 11:48:44,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:48:44,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934226381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:44,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:48:44,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 19 [2022-11-16 11:48:44,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136512559] [2022-11-16 11:48:44,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:44,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:48:44,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:44,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:48:44,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:48:44,486 INFO L87 Difference]: Start difference. First operand 2293 states and 3534 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:48:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:55,896 INFO L93 Difference]: Finished difference Result 2643 states and 4055 transitions. [2022-11-16 11:48:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:48:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 112 [2022-11-16 11:48:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:55,916 INFO L225 Difference]: With dead ends: 2643 [2022-11-16 11:48:55,916 INFO L226 Difference]: Without dead ends: 2640 [2022-11-16 11:48:55,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:48:55,920 INFO L413 NwaCegarLoop]: 1241 mSDtfsCounter, 3593 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 2652 mSolverCounterSat, 1163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3660 SdHoareTripleChecker+Valid, 3321 SdHoareTripleChecker+Invalid, 3815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 2652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:55,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3660 Valid, 3321 Invalid, 3815 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1163 Valid, 2652 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-11-16 11:48:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2022-11-16 11:48:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2633. [2022-11-16 11:48:56,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2633 states, 2043 states have (on average 1.440039158100832) internal successors, (2942), 2070 states have internal predecessors, (2942), 483 states have call successors, (483), 100 states have call predecessors, (483), 106 states have return successors, (619), 482 states have call predecessors, (619), 480 states have call successors, (619) [2022-11-16 11:48:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 4044 transitions. [2022-11-16 11:48:56,104 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 4044 transitions. Word has length 112 [2022-11-16 11:48:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:56,104 INFO L495 AbstractCegarLoop]: Abstraction has 2633 states and 4044 transitions. [2022-11-16 11:48:56,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:48:56,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 4044 transitions. [2022-11-16 11:48:56,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-16 11:48:56,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:56,112 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2022-11-16 11:48:56,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:56,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:56,328 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2141371472, now seen corresponding path program 1 times [2022-11-16 11:48:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:56,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58643834] [2022-11-16 11:48:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:56,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:48:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-16 11:48:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 11:48:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 11:48:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-16 11:48:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:48:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:48:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:48:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:48:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:48:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:48:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-11-16 11:48:56,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:56,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58643834] [2022-11-16 11:48:56,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58643834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:56,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98238256] [2022-11-16 11:48:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:56,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:56,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:56,970 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:56,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:48:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:48:58,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-16 11:48:59,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:48:59,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98238256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:59,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:48:59,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-16 11:48:59,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885434282] [2022-11-16 11:48:59,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:59,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:48:59,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:59,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:48:59,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:48:59,389 INFO L87 Difference]: Start difference. First operand 2633 states and 4044 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-16 11:48:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:59,550 INFO L93 Difference]: Finished difference Result 2635 states and 4045 transitions. [2022-11-16 11:48:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:48:59,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 132 [2022-11-16 11:48:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:59,584 INFO L225 Difference]: With dead ends: 2635 [2022-11-16 11:48:59,585 INFO L226 Difference]: Without dead ends: 2632 [2022-11-16 11:48:59,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:48:59,588 INFO L413 NwaCegarLoop]: 1721 mSDtfsCounter, 1634 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:59,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1634 Valid, 1721 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:48:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2022-11-16 11:48:59,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2620. [2022-11-16 11:48:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2039 states have (on average 1.4404119666503188) internal successors, (2937), 2060 states have internal predecessors, (2937), 474 states have call successors, (474), 98 states have call predecessors, (474), 106 states have return successors, (611), 481 states have call predecessors, (611), 472 states have call successors, (611) [2022-11-16 11:48:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 4022 transitions. [2022-11-16 11:48:59,773 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 4022 transitions. Word has length 132 [2022-11-16 11:48:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:59,773 INFO L495 AbstractCegarLoop]: Abstraction has 2620 states and 4022 transitions. [2022-11-16 11:48:59,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-16 11:48:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 4022 transitions. [2022-11-16 11:48:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-16 11:48:59,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:59,790 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 3, 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] [2022-11-16 11:48:59,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:00,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:49:00,003 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:00,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1688095321, now seen corresponding path program 1 times [2022-11-16 11:49:00,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:00,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088283640] [2022-11-16 11:49:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:00,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:49:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-16 11:49:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-16 11:49:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:49:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:49:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 11:49:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 11:49:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:49:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:49:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:49:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:49:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:49:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:49:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:49:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-16 11:49:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2022-11-16 11:49:00,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088283640] [2022-11-16 11:49:00,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088283640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:00,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:49:00,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:49:00,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222070092] [2022-11-16 11:49:00,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:00,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:49:00,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:00,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:49:00,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:49:00,566 INFO L87 Difference]: Start difference. First operand 2620 states and 4022 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 11:49:03,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:49:15,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:49:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:19,210 INFO L93 Difference]: Finished difference Result 5849 states and 9281 transitions. [2022-11-16 11:49:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:49:19,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 170 [2022-11-16 11:49:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:19,233 INFO L225 Difference]: With dead ends: 5849 [2022-11-16 11:49:19,233 INFO L226 Difference]: Without dead ends: 3356 [2022-11-16 11:49:19,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:49:19,246 INFO L413 NwaCegarLoop]: 1393 mSDtfsCounter, 1347 mSDsluCounter, 3127 mSDsCounter, 0 mSdLazyCounter, 3316 mSolverCounterSat, 489 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 4520 SdHoareTripleChecker+Invalid, 3807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 3316 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:19,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1456 Valid, 4520 Invalid, 3807 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [489 Valid, 3316 Invalid, 2 Unknown, 0 Unchecked, 18.2s Time] [2022-11-16 11:49:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2022-11-16 11:49:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2620. [2022-11-16 11:49:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2039 states have (on average 1.4374693477194704) internal successors, (2931), 2060 states have internal predecessors, (2931), 474 states have call successors, (474), 98 states have call predecessors, (474), 106 states have return successors, (611), 481 states have call predecessors, (611), 472 states have call successors, (611) [2022-11-16 11:49:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 4016 transitions. [2022-11-16 11:49:19,456 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 4016 transitions. Word has length 170 [2022-11-16 11:49:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:19,457 INFO L495 AbstractCegarLoop]: Abstraction has 2620 states and 4016 transitions. [2022-11-16 11:49:19,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 11:49:19,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 4016 transitions. [2022-11-16 11:49:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-16 11:49:19,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:19,473 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 3, 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] [2022-11-16 11:49:19,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:49:19,473 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:19,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1144503741, now seen corresponding path program 1 times [2022-11-16 11:49:19,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:19,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020060501] [2022-11-16 11:49:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:19,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:19,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:49:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:19,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-16 11:49:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:19,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-16 11:49:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:20,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:49:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:20,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:49:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:20,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:49:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:20,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:49:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:20,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:49:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:20,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:49:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:20,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:49:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:21,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:49:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:21,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:49:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:21,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:49:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:21,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-16 11:49:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-16 11:49:21,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:21,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020060501] [2022-11-16 11:49:21,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020060501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:21,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957218636] [2022-11-16 11:49:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:21,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:21,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:21,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:21,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:49:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:22,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:49:22,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:49:23,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:49:25,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957218636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:25,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:49:25,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 33 [2022-11-16 11:49:25,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657692430] [2022-11-16 11:49:25,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:25,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:49:25,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:49:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=759, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:49:25,342 INFO L87 Difference]: Start difference. First operand 2620 states and 4016 transitions. Second operand has 33 states, 32 states have (on average 8.59375) internal successors, (275), 29 states have internal predecessors, (275), 4 states have call successors, (37), 5 states have call predecessors, (37), 3 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-11-16 11:49:30,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:49:32,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:01,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:09,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:09,715 INFO L93 Difference]: Finished difference Result 5953 states and 9422 transitions. [2022-11-16 11:50:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 11:50:09,716 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 8.59375) internal successors, (275), 29 states have internal predecessors, (275), 4 states have call successors, (37), 5 states have call predecessors, (37), 3 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 167 [2022-11-16 11:50:09,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:09,737 INFO L225 Difference]: With dead ends: 5953 [2022-11-16 11:50:09,738 INFO L226 Difference]: Without dead ends: 3456 [2022-11-16 11:50:09,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=397, Invalid=1673, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:50:09,749 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 3329 mSDsluCounter, 11227 mSDsCounter, 0 mSdLazyCounter, 9385 mSolverCounterSat, 1139 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3452 SdHoareTripleChecker+Valid, 12646 SdHoareTripleChecker+Invalid, 10527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1139 IncrementalHoareTripleChecker+Valid, 9385 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:09,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3452 Valid, 12646 Invalid, 10527 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1139 Valid, 9385 Invalid, 3 Unknown, 0 Unchecked, 41.7s Time] [2022-11-16 11:50:09,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3456 states. [2022-11-16 11:50:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3456 to 2784. [2022-11-16 11:50:09,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2177 states have (on average 1.4230592558566835) internal successors, (3098), 2197 states have internal predecessors, (3098), 500 states have call successors, (500), 98 states have call predecessors, (500), 106 states have return successors, (663), 508 states have call predecessors, (663), 498 states have call successors, (663) [2022-11-16 11:50:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 4261 transitions. [2022-11-16 11:50:09,963 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 4261 transitions. Word has length 167 [2022-11-16 11:50:09,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:09,963 INFO L495 AbstractCegarLoop]: Abstraction has 2784 states and 4261 transitions. [2022-11-16 11:50:09,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 8.59375) internal successors, (275), 29 states have internal predecessors, (275), 4 states have call successors, (37), 5 states have call predecessors, (37), 3 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-11-16 11:50:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 4261 transitions. [2022-11-16 11:50:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-16 11:50:09,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:09,984 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 10, 10, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 11:50:10,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:10,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:10,196 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:50:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:10,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1954023599, now seen corresponding path program 1 times [2022-11-16 11:50:10,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:10,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364059732] [2022-11-16 11:50:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:10,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:10,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:50:10,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875251949] [2022-11-16 11:50:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:10,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:10,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:10,359 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:10,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:50:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:12,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 3794 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:50:12,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 207 proven. 100 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2022-11-16 11:50:12,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 197 proven. 100 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2022-11-16 11:50:13,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:13,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364059732] [2022-11-16 11:50:13,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:50:13,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875251949] [2022-11-16 11:50:13,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875251949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:13,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:50:13,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-16 11:50:13,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424485619] [2022-11-16 11:50:13,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:13,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:50:13,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:50:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:50:13,870 INFO L87 Difference]: Start difference. First operand 2784 states and 4261 transitions. Second operand has 24 states, 24 states have (on average 8.0) internal successors, (192), 24 states have internal predecessors, (192), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-16 11:50:16,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:18,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:20,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:20,336 INFO L93 Difference]: Finished difference Result 5607 states and 8679 transitions. [2022-11-16 11:50:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:50:20,336 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 8.0) internal successors, (192), 24 states have internal predecessors, (192), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 259 [2022-11-16 11:50:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:20,354 INFO L225 Difference]: With dead ends: 5607 [2022-11-16 11:50:20,354 INFO L226 Difference]: Without dead ends: 2832 [2022-11-16 11:50:20,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:50:20,371 INFO L413 NwaCegarLoop]: 1718 mSDtfsCounter, 22 mSDsluCounter, 5145 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6863 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:20,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 6863 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 48 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2022-11-16 11:50:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2022-11-16 11:50:20,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2832. [2022-11-16 11:50:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2225 states have (on average 1.4139325842696628) internal successors, (3146), 2245 states have internal predecessors, (3146), 500 states have call successors, (500), 98 states have call predecessors, (500), 106 states have return successors, (663), 508 states have call predecessors, (663), 498 states have call successors, (663) [2022-11-16 11:50:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 4309 transitions. [2022-11-16 11:50:20,660 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 4309 transitions. Word has length 259 [2022-11-16 11:50:20,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:20,661 INFO L495 AbstractCegarLoop]: Abstraction has 2832 states and 4309 transitions. [2022-11-16 11:50:20,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.0) internal successors, (192), 24 states have internal predecessors, (192), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-16 11:50:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 4309 transitions. [2022-11-16 11:50:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-11-16 11:50:20,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:20,683 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 11:50:20,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:20,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:50:20,904 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:50:20,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:20,905 INFO L85 PathProgramCache]: Analyzing trace with hash -421805823, now seen corresponding path program 2 times [2022-11-16 11:50:20,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:20,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131292565] [2022-11-16 11:50:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:20,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:21,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:50:21,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074248394] [2022-11-16 11:50:21,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:50:21,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:21,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:21,065 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:21,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:50:22,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:50:22,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:50:22,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 3974 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:50:22,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 207 proven. 484 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2022-11-16 11:50:24,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 197 proven. 484 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2022-11-16 11:50:27,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:27,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131292565] [2022-11-16 11:50:27,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:50:27,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074248394] [2022-11-16 11:50:27,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074248394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:27,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:50:27,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 34 [2022-11-16 11:50:27,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358342149] [2022-11-16 11:50:27,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:27,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:50:27,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:27,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:50:27,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:50:27,325 INFO L87 Difference]: Start difference. First operand 2832 states and 4309 transitions. Second operand has 34 states, 34 states have (on average 6.294117647058823) internal successors, (214), 34 states have internal predecessors, (214), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-16 11:50:29,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:31,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:33,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:34,022 INFO L93 Difference]: Finished difference Result 5695 states and 8763 transitions. [2022-11-16 11:50:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 11:50:34,022 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.294117647058823) internal successors, (214), 34 states have internal predecessors, (214), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 283 [2022-11-16 11:50:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:34,038 INFO L225 Difference]: With dead ends: 5695 [2022-11-16 11:50:34,039 INFO L226 Difference]: Without dead ends: 2872 [2022-11-16 11:50:34,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 518 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:50:34,057 INFO L413 NwaCegarLoop]: 1718 mSDtfsCounter, 32 mSDsluCounter, 5145 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 6863 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:34,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 6863 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2022-11-16 11:50:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2022-11-16 11:50:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2872. [2022-11-16 11:50:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2265 states have (on average 1.4066225165562913) internal successors, (3186), 2285 states have internal predecessors, (3186), 500 states have call successors, (500), 98 states have call predecessors, (500), 106 states have return successors, (663), 508 states have call predecessors, (663), 498 states have call successors, (663) [2022-11-16 11:50:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 4349 transitions. [2022-11-16 11:50:34,360 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 4349 transitions. Word has length 283 [2022-11-16 11:50:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:34,360 INFO L495 AbstractCegarLoop]: Abstraction has 2872 states and 4349 transitions. [2022-11-16 11:50:34,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.294117647058823) internal successors, (214), 34 states have internal predecessors, (214), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-16 11:50:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 4349 transitions. [2022-11-16 11:50:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-16 11:50:34,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:34,380 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:34,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:34,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:50:34,596 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:50:34,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:34,597 INFO L85 PathProgramCache]: Analyzing trace with hash -540778768, now seen corresponding path program 1 times [2022-11-16 11:50:34,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:34,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562537000] [2022-11-16 11:50:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:34,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:34,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:50:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-16 11:50:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-11-16 11:50:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:50:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:50:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 11:50:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:50:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:50:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:50:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:50:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:50:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:50:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:50:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-11-16 11:50:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 963 trivial. 0 not checked. [2022-11-16 11:50:35,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:35,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562537000] [2022-11-16 11:50:35,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562537000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:35,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102758417] [2022-11-16 11:50:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:35,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:35,348 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:35,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:50:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:36,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 2272 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:50:36,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 4 proven. 946 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 11:50:39,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:50:42,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102758417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:42,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:50:42,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 25, 25] total 39 [2022-11-16 11:50:42,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249114091] [2022-11-16 11:50:42,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:42,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 11:50:42,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 11:50:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=908, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:50:42,948 INFO L87 Difference]: Start difference. First operand 2872 states and 4349 transitions. Second operand has 39 states, 39 states have (on average 8.153846153846153) internal successors, (318), 36 states have internal predecessors, (318), 2 states have call successors, (37), 5 states have call predecessors, (37), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-16 11:50:48,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:50,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:51:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:14,805 INFO L93 Difference]: Finished difference Result 6270 states and 9796 transitions. [2022-11-16 11:51:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 11:51:14,808 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 8.153846153846153) internal successors, (318), 36 states have internal predecessors, (318), 2 states have call successors, (37), 5 states have call predecessors, (37), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 219 [2022-11-16 11:51:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:14,831 INFO L225 Difference]: With dead ends: 6270 [2022-11-16 11:51:14,832 INFO L226 Difference]: Without dead ends: 3665 [2022-11-16 11:51:14,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 418 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=579, Invalid=981, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 11:51:14,845 INFO L413 NwaCegarLoop]: 1417 mSDtfsCounter, 2597 mSDsluCounter, 10420 mSDsCounter, 0 mSdLazyCounter, 6873 mSolverCounterSat, 1390 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2777 SdHoareTripleChecker+Valid, 11837 SdHoareTripleChecker+Invalid, 8265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1390 IncrementalHoareTripleChecker+Valid, 6873 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:14,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2777 Valid, 11837 Invalid, 8265 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1390 Valid, 6873 Invalid, 2 Unknown, 0 Unchecked, 31.1s Time] [2022-11-16 11:51:14,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2022-11-16 11:51:15,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3002. [2022-11-16 11:51:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 2373 states have (on average 1.3973872734934683) internal successors, (3316), 2394 states have internal predecessors, (3316), 522 states have call successors, (522), 98 states have call predecessors, (522), 106 states have return successors, (707), 529 states have call predecessors, (707), 520 states have call successors, (707) [2022-11-16 11:51:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 4545 transitions. [2022-11-16 11:51:15,099 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 4545 transitions. Word has length 219 [2022-11-16 11:51:15,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:15,100 INFO L495 AbstractCegarLoop]: Abstraction has 3002 states and 4545 transitions. [2022-11-16 11:51:15,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 8.153846153846153) internal successors, (318), 36 states have internal predecessors, (318), 2 states have call successors, (37), 5 states have call predecessors, (37), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-16 11:51:15,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 4545 transitions. [2022-11-16 11:51:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-11-16 11:51:15,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:15,138 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:15,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:15,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:51:15,353 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:51:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash -512394285, now seen corresponding path program 1 times [2022-11-16 11:51:15,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:15,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452580307] [2022-11-16 11:51:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:15,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:15,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:51:15,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532755945] [2022-11-16 11:51:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:15,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:15,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:15,541 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:15,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:51:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 4762 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:51:17,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 65 proven. 86 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2022-11-16 11:51:18,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1281 trivial. 0 not checked. [2022-11-16 11:51:22,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:22,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452580307] [2022-11-16 11:51:22,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:51:22,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532755945] [2022-11-16 11:51:22,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532755945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:22,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:51:22,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 13 [2022-11-16 11:51:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323746486] [2022-11-16 11:51:22,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:51:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:51:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:51:22,330 INFO L87 Difference]: Start difference. First operand 3002 states and 4545 transitions. Second operand has 13 states, 13 states have (on average 13.692307692307692) internal successors, (178), 13 states have internal predecessors, (178), 8 states have call successors, (59), 8 states have call predecessors, (59), 10 states have return successors, (55), 7 states have call predecessors, (55), 7 states have call successors, (55) [2022-11-16 11:51:39,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:39,112 INFO L93 Difference]: Finished difference Result 3197 states and 4824 transitions. [2022-11-16 11:51:39,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:51:39,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.692307692307692) internal successors, (178), 13 states have internal predecessors, (178), 8 states have call successors, (59), 8 states have call predecessors, (59), 10 states have return successors, (55), 7 states have call predecessors, (55), 7 states have call successors, (55) Word has length 369 [2022-11-16 11:51:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:39,133 INFO L225 Difference]: With dead ends: 3197 [2022-11-16 11:51:39,134 INFO L226 Difference]: Without dead ends: 3194 [2022-11-16 11:51:39,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 724 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:51:39,138 INFO L413 NwaCegarLoop]: 1192 mSDtfsCounter, 6589 mSDsluCounter, 3129 mSDsCounter, 0 mSdLazyCounter, 3923 mSolverCounterSat, 2717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6596 SdHoareTripleChecker+Valid, 4321 SdHoareTripleChecker+Invalid, 6640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2717 IncrementalHoareTripleChecker+Valid, 3923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:39,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6596 Valid, 4321 Invalid, 6640 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2717 Valid, 3923 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time] [2022-11-16 11:51:39,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2022-11-16 11:51:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3134. [2022-11-16 11:51:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 2481 states have (on average 1.403063280935107) internal successors, (3481), 2500 states have internal predecessors, (3481), 531 states have call successors, (531), 111 states have call predecessors, (531), 121 states have return successors, (718), 543 states have call predecessors, (718), 530 states have call successors, (718) [2022-11-16 11:51:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 4730 transitions. [2022-11-16 11:51:39,496 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 4730 transitions. Word has length 369 [2022-11-16 11:51:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:39,497 INFO L495 AbstractCegarLoop]: Abstraction has 3134 states and 4730 transitions. [2022-11-16 11:51:39,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.692307692307692) internal successors, (178), 13 states have internal predecessors, (178), 8 states have call successors, (59), 8 states have call predecessors, (59), 10 states have return successors, (55), 7 states have call predecessors, (55), 7 states have call successors, (55) [2022-11-16 11:51:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 4730 transitions. [2022-11-16 11:51:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-16 11:51:39,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:39,517 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:39,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:39,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:39,735 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:51:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:39,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1466349166, now seen corresponding path program 1 times [2022-11-16 11:51:39,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:39,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562220383] [2022-11-16 11:51:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:39,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:40,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:51:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:40,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:51:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:40,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:51:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:40,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:51:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:40,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:51:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:40,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 11:51:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:40,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-16 11:51:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:40,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:51:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:40,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:51:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:40,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:51:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:41,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:51:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:41,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:51:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:41,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:51:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:41,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:51:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:41,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-11-16 11:51:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2022-11-16 11:51:41,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:41,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562220383] [2022-11-16 11:51:41,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562220383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:41,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353988059] [2022-11-16 11:51:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:41,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:41,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:41,120 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:41,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:51:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:42,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 2359 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:51:42,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2022-11-16 11:51:42,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:51:42,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353988059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:51:42,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:51:42,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2022-11-16 11:51:42,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248095205] [2022-11-16 11:51:42,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:42,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:51:42,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:42,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:51:42,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:51:42,952 INFO L87 Difference]: Start difference. First operand 3134 states and 4730 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 11:51:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:43,271 INFO L93 Difference]: Finished difference Result 5937 states and 8977 transitions. [2022-11-16 11:51:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:51:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 264 [2022-11-16 11:51:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:43,292 INFO L225 Difference]: With dead ends: 5937 [2022-11-16 11:51:43,293 INFO L226 Difference]: Without dead ends: 3194 [2022-11-16 11:51:43,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:51:43,307 INFO L413 NwaCegarLoop]: 1721 mSDtfsCounter, 19 mSDsluCounter, 1707 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:43,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3428 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:51:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2022-11-16 11:51:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3140. [2022-11-16 11:51:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 2487 states have (on average 1.4020908725371934) internal successors, (3487), 2506 states have internal predecessors, (3487), 531 states have call successors, (531), 111 states have call predecessors, (531), 121 states have return successors, (718), 543 states have call predecessors, (718), 530 states have call successors, (718) [2022-11-16 11:51:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4736 transitions. [2022-11-16 11:51:43,645 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4736 transitions. Word has length 264 [2022-11-16 11:51:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:43,646 INFO L495 AbstractCegarLoop]: Abstraction has 3140 states and 4736 transitions. [2022-11-16 11:51:43,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 11:51:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4736 transitions. [2022-11-16 11:51:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-16 11:51:43,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:43,665 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:43,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:43,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:43,879 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:51:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash -865532896, now seen corresponding path program 1 times [2022-11-16 11:51:43,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:43,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386552386] [2022-11-16 11:51:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:43,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:44,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:51:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:44,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:51:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:44,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:51:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:51:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:51:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 11:51:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:51:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:51:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:51:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:51:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:51:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:51:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:51:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2022-11-16 11:51:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2039 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2022-11-16 11:51:45,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:45,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386552386] [2022-11-16 11:51:45,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386552386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:45,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701424516] [2022-11-16 11:51:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:45,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:45,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:45,694 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:45,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:51:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:47,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 2374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:51:47,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2039 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:51:47,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2039 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2022-11-16 11:51:48,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701424516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:48,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:51:48,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 15 [2022-11-16 11:51:48,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654246790] [2022-11-16 11:51:48,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:48,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:51:48,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:51:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:51:48,206 INFO L87 Difference]: Start difference. First operand 3140 states and 4736 transitions. Second operand has 15 states, 14 states have (on average 9.0) internal successors, (126), 11 states have internal predecessors, (126), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-16 11:51:52,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:52:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:52:23,926 INFO L93 Difference]: Finished difference Result 6850 states and 10729 transitions. [2022-11-16 11:52:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:52:23,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 9.0) internal successors, (126), 11 states have internal predecessors, (126), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 263 [2022-11-16 11:52:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:52:23,945 INFO L225 Difference]: With dead ends: 6850 [2022-11-16 11:52:23,946 INFO L226 Difference]: Without dead ends: 4101 [2022-11-16 11:52:23,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:52:23,959 INFO L413 NwaCegarLoop]: 1439 mSDtfsCounter, 3626 mSDsluCounter, 9563 mSDsCounter, 0 mSdLazyCounter, 7512 mSolverCounterSat, 1442 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3703 SdHoareTripleChecker+Valid, 11002 SdHoareTripleChecker+Invalid, 8955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1442 IncrementalHoareTripleChecker+Valid, 7512 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:52:23,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3703 Valid, 11002 Invalid, 8955 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1442 Valid, 7512 Invalid, 1 Unknown, 0 Unchecked, 32.6s Time] [2022-11-16 11:52:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2022-11-16 11:52:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3224. [2022-11-16 11:52:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 2559 states have (on average 1.4001563110590074) internal successors, (3583), 2578 states have internal predecessors, (3583), 543 states have call successors, (543), 111 states have call predecessors, (543), 121 states have return successors, (742), 555 states have call predecessors, (742), 542 states have call successors, (742) [2022-11-16 11:52:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 4868 transitions. [2022-11-16 11:52:24,269 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 4868 transitions. Word has length 263 [2022-11-16 11:52:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:52:24,273 INFO L495 AbstractCegarLoop]: Abstraction has 3224 states and 4868 transitions. [2022-11-16 11:52:24,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 9.0) internal successors, (126), 11 states have internal predecessors, (126), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-16 11:52:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 4868 transitions. [2022-11-16 11:52:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-16 11:52:24,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:52:24,293 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:52:24,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:52:24,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:52:24,517 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:52:24,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:52:24,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2118661460, now seen corresponding path program 1 times [2022-11-16 11:52:24,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:52:24,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655386711] [2022-11-16 11:52:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:52:24,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:52:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:24,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:52:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:24,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:52:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:25,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:52:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:25,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:52:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:25,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:52:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:25,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 11:52:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:25,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 11:52:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:25,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:52:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:26,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:52:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:26,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:52:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:26,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:52:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:26,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:52:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:26,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:52:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:26,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:52:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:26,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2022-11-16 11:52:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2022-11-16 11:52:26,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:52:26,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655386711] [2022-11-16 11:52:26,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655386711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:52:26,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681009894] [2022-11-16 11:52:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:52:26,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:52:26,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:52:26,176 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:52:26,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:52:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2372 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:52:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:52:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2022-11-16 11:52:28,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:52:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-11-16 11:52:28,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681009894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:52:28,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:52:28,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 13 [2022-11-16 11:52:28,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397622955] [2022-11-16 11:52:28,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:52:28,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:52:28,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:52:28,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:52:28,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:52:28,418 INFO L87 Difference]: Start difference. First operand 3224 states and 4868 transitions. Second operand has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-16 11:52:33,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:52:35,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:53:04,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:53:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:12,995 INFO L93 Difference]: Finished difference Result 7024 states and 10946 transitions. [2022-11-16 11:53:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:53:12,999 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 268 [2022-11-16 11:53:13,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:13,020 INFO L225 Difference]: With dead ends: 7024 [2022-11-16 11:53:13,020 INFO L226 Difference]: Without dead ends: 4191 [2022-11-16 11:53:13,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:53:13,030 INFO L413 NwaCegarLoop]: 1390 mSDtfsCounter, 3395 mSDsluCounter, 9708 mSDsCounter, 0 mSdLazyCounter, 8389 mSolverCounterSat, 1199 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3474 SdHoareTripleChecker+Valid, 11098 SdHoareTripleChecker+Invalid, 9591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1199 IncrementalHoareTripleChecker+Valid, 8389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:13,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3474 Valid, 11098 Invalid, 9591 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1199 Valid, 8389 Invalid, 3 Unknown, 0 Unchecked, 41.8s Time] [2022-11-16 11:53:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2022-11-16 11:53:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 3404. [2022-11-16 11:53:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3404 states, 2712 states have (on average 1.3908554572271385) internal successors, (3772), 2731 states have internal predecessors, (3772), 570 states have call successors, (570), 111 states have call predecessors, (570), 121 states have return successors, (796), 582 states have call predecessors, (796), 569 states have call successors, (796) [2022-11-16 11:53:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 5138 transitions. [2022-11-16 11:53:13,378 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 5138 transitions. Word has length 268 [2022-11-16 11:53:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:13,379 INFO L495 AbstractCegarLoop]: Abstraction has 3404 states and 5138 transitions. [2022-11-16 11:53:13,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-16 11:53:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 5138 transitions. [2022-11-16 11:53:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-11-16 11:53:13,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:13,401 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 6, 6, 6, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:53:13,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:53:13,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 11:53:13,615 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:53:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:13,615 INFO L85 PathProgramCache]: Analyzing trace with hash -727751237, now seen corresponding path program 2 times [2022-11-16 11:53:13,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:53:13,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501898821] [2022-11-16 11:53:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:13,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:53:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:14,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:53:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:14,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:53:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:14,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:53:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:15,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:53:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:15,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:53:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:15,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:53:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:15,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:53:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:16,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:53:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:16,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:53:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:16,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:53:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:16,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:53:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:16,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:53:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:16,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:53:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:16,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2022-11-16 11:53:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2099 backedges. 2 proven. 68 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2022-11-16 11:53:16,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:53:16,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501898821] [2022-11-16 11:53:16,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501898821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:53:16,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367763999] [2022-11-16 11:53:16,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:53:16,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:53:16,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:53:16,184 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:53:16,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:53:17,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:53:17,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:53:17,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 2423 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:53:17,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:53:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2099 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:53:18,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:53:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2099 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2022-11-16 11:53:19,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367763999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:53:19,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:53:19,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 23 [2022-11-16 11:53:19,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729449143] [2022-11-16 11:53:19,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:53:19,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:53:19,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:53:19,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:53:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:53:19,424 INFO L87 Difference]: Start difference. First operand 3404 states and 5138 transitions. Second operand has 23 states, 22 states have (on average 7.181818181818182) internal successors, (158), 19 states have internal predecessors, (158), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-16 11:53:25,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:53:27,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:54:01,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:54:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:12,439 INFO L93 Difference]: Finished difference Result 7372 states and 11486 transitions. [2022-11-16 11:54:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 11:54:12,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 7.181818181818182) internal successors, (158), 19 states have internal predecessors, (158), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 279 [2022-11-16 11:54:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:12,467 INFO L225 Difference]: With dead ends: 7372 [2022-11-16 11:54:12,467 INFO L226 Difference]: Without dead ends: 4359 [2022-11-16 11:54:12,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=866, Invalid=2674, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 11:54:12,481 INFO L413 NwaCegarLoop]: 1407 mSDtfsCounter, 3599 mSDsluCounter, 13618 mSDsCounter, 0 mSdLazyCounter, 9622 mSolverCounterSat, 1174 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3678 SdHoareTripleChecker+Valid, 15025 SdHoareTripleChecker+Invalid, 10799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1174 IncrementalHoareTripleChecker+Valid, 9622 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:12,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3678 Valid, 15025 Invalid, 10799 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1174 Valid, 9622 Invalid, 3 Unknown, 0 Unchecked, 47.0s Time] [2022-11-16 11:54:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2022-11-16 11:54:12,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 3572. [2022-11-16 11:54:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 2856 states have (on average 1.387955182072829) internal successors, (3964), 2875 states have internal predecessors, (3964), 594 states have call successors, (594), 111 states have call predecessors, (594), 121 states have return successors, (844), 606 states have call predecessors, (844), 593 states have call successors, (844) [2022-11-16 11:54:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 5402 transitions. [2022-11-16 11:54:12,826 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 5402 transitions. Word has length 279 [2022-11-16 11:54:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:12,829 INFO L495 AbstractCegarLoop]: Abstraction has 3572 states and 5402 transitions. [2022-11-16 11:54:12,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 7.181818181818182) internal successors, (158), 19 states have internal predecessors, (158), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-16 11:54:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 5402 transitions. [2022-11-16 11:54:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-16 11:54:12,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:12,853 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:12,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:13,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 11:54:13,068 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2064253930, now seen corresponding path program 1 times [2022-11-16 11:54:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:13,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85612804] [2022-11-16 11:54:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:13,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:54:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:54:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:54:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:54:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:54:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-16 11:54:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:54:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:54:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:54:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:54:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:54:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-11-16 11:54:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2022-11-16 11:54:13,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:13,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85612804] [2022-11-16 11:54:13,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85612804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:13,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:13,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:54:13,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422090120] [2022-11-16 11:54:13,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:13,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:54:13,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:13,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:54:13,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:54:13,585 INFO L87 Difference]: Start difference. First operand 3572 states and 5402 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:54:16,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:54:18,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:54:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:29,656 INFO L93 Difference]: Finished difference Result 7536 states and 11722 transitions. [2022-11-16 11:54:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:54:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 259 [2022-11-16 11:54:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:29,687 INFO L225 Difference]: With dead ends: 7536 [2022-11-16 11:54:29,688 INFO L226 Difference]: Without dead ends: 4355 [2022-11-16 11:54:29,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:54:29,703 INFO L413 NwaCegarLoop]: 1391 mSDtfsCounter, 2351 mSDsluCounter, 2638 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 1199 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2463 SdHoareTripleChecker+Valid, 4029 SdHoareTripleChecker+Invalid, 3508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1199 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:29,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2463 Valid, 4029 Invalid, 3508 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1199 Valid, 2307 Invalid, 2 Unknown, 0 Unchecked, 15.5s Time] [2022-11-16 11:54:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2022-11-16 11:54:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 3572. [2022-11-16 11:54:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 2856 states have (on average 1.3858543417366946) internal successors, (3958), 2875 states have internal predecessors, (3958), 594 states have call successors, (594), 111 states have call predecessors, (594), 121 states have return successors, (844), 606 states have call predecessors, (844), 593 states have call successors, (844) [2022-11-16 11:54:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 5396 transitions. [2022-11-16 11:54:30,042 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 5396 transitions. Word has length 259 [2022-11-16 11:54:30,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:30,043 INFO L495 AbstractCegarLoop]: Abstraction has 3572 states and 5396 transitions. [2022-11-16 11:54:30,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:54:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 5396 transitions. [2022-11-16 11:54:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-11-16 11:54:30,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:30,063 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:30,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-16 11:54:30,064 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1887148427, now seen corresponding path program 1 times [2022-11-16 11:54:30,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:30,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797186967] [2022-11-16 11:54:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:30,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:30,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:54:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:30,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:54:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:30,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:54:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:54:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:54:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 11:54:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:54:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:54:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:54:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:54:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:54:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2022-11-16 11:54:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2022-11-16 11:54:31,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:31,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797186967] [2022-11-16 11:54:31,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797186967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:31,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942024528] [2022-11-16 11:54:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:31,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:31,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:31,356 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:31,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:54:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:33,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 2210 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:54:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:54:33,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:54:33,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942024528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:33,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:54:33,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2022-11-16 11:54:33,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346840393] [2022-11-16 11:54:33,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:33,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:54:33,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:33,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:54:33,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:54:33,159 INFO L87 Difference]: Start difference. First operand 3572 states and 5396 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:54:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:33,436 INFO L93 Difference]: Finished difference Result 6985 states and 10628 transitions. [2022-11-16 11:54:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:54:33,437 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), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 258 [2022-11-16 11:54:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:33,463 INFO L225 Difference]: With dead ends: 6985 [2022-11-16 11:54:33,464 INFO L226 Difference]: Without dead ends: 3804 [2022-11-16 11:54:33,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:54:33,477 INFO L413 NwaCegarLoop]: 1735 mSDtfsCounter, 93 mSDsluCounter, 1707 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:33,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 3442 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:54:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3804 states. [2022-11-16 11:54:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3804 to 3580. [2022-11-16 11:54:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 2864 states have (on average 1.3868715083798884) internal successors, (3972), 2883 states have internal predecessors, (3972), 594 states have call successors, (594), 111 states have call predecessors, (594), 121 states have return successors, (844), 606 states have call predecessors, (844), 593 states have call successors, (844) [2022-11-16 11:54:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 5410 transitions. [2022-11-16 11:54:33,731 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 5410 transitions. Word has length 258 [2022-11-16 11:54:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:33,732 INFO L495 AbstractCegarLoop]: Abstraction has 3580 states and 5410 transitions. [2022-11-16 11:54:33,732 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), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:54:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 5410 transitions. [2022-11-16 11:54:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-16 11:54:33,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:33,752 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:33,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:33,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 11:54:33,953 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:33,954 INFO L85 PathProgramCache]: Analyzing trace with hash 887029312, now seen corresponding path program 1 times [2022-11-16 11:54:33,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:33,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837456141] [2022-11-16 11:54:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:33,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:34,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:54:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:34,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:54:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:34,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:54:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:34,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:34,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:54:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:35,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:54:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:35,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-16 11:54:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:35,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:54:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:35,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:54:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:35,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:54:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:35,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:35,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:54:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:35,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:54:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:35,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2022-11-16 11:54:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2022-11-16 11:54:35,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:35,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837456141] [2022-11-16 11:54:35,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837456141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:35,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395343060] [2022-11-16 11:54:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:35,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:35,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:35,186 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:35,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:54:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:36,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 2216 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:54:36,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:54:36,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:54:36,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395343060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:36,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:54:36,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2022-11-16 11:54:36,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068679275] [2022-11-16 11:54:36,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:36,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:54:36,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:54:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:54:36,954 INFO L87 Difference]: Start difference. First operand 3580 states and 5410 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:54:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:37,218 INFO L93 Difference]: Finished difference Result 7001 states and 10654 transitions. [2022-11-16 11:54:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:54:37,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 260 [2022-11-16 11:54:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:37,239 INFO L225 Difference]: With dead ends: 7001 [2022-11-16 11:54:37,239 INFO L226 Difference]: Without dead ends: 3812 [2022-11-16 11:54:37,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:54:37,251 INFO L413 NwaCegarLoop]: 1807 mSDtfsCounter, 88 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 3531 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:37,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 3531 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:54:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3812 states. [2022-11-16 11:54:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3812 to 3590. [2022-11-16 11:54:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3590 states, 2874 states have (on average 1.3876130828114126) internal successors, (3988), 2893 states have internal predecessors, (3988), 594 states have call successors, (594), 111 states have call predecessors, (594), 121 states have return successors, (844), 606 states have call predecessors, (844), 593 states have call successors, (844) [2022-11-16 11:54:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 5426 transitions. [2022-11-16 11:54:37,492 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 5426 transitions. Word has length 260 [2022-11-16 11:54:37,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:37,492 INFO L495 AbstractCegarLoop]: Abstraction has 3590 states and 5426 transitions. [2022-11-16 11:54:37,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:54:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 5426 transitions. [2022-11-16 11:54:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-16 11:54:37,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:37,513 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:37,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:37,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 11:54:37,727 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:37,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:37,728 INFO L85 PathProgramCache]: Analyzing trace with hash 101649646, now seen corresponding path program 1 times [2022-11-16 11:54:37,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:37,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486365555] [2022-11-16 11:54:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:37,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:38,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:54:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:38,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:54:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:38,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:54:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:38,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:39,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:54:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:39,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:54:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:39,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-16 11:54:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:39,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:54:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:39,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:54:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:39,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:54:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:39,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:39,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:54:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:39,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:54:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:39,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-11-16 11:54:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2022-11-16 11:54:39,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:39,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486365555] [2022-11-16 11:54:39,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486365555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:39,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371810403] [2022-11-16 11:54:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:39,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:39,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:39,464 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:39,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:54:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:41,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 2210 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:54:41,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:54:41,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:54:41,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371810403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:41,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:54:41,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 12 [2022-11-16 11:54:41,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236081141] [2022-11-16 11:54:41,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:41,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:54:41,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:41,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:54:41,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:54:41,080 INFO L87 Difference]: Start difference. First operand 3590 states and 5426 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:54:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:41,628 INFO L93 Difference]: Finished difference Result 6823 states and 10324 transitions. [2022-11-16 11:54:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:54:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 259 [2022-11-16 11:54:41,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:41,654 INFO L225 Difference]: With dead ends: 6823 [2022-11-16 11:54:41,655 INFO L226 Difference]: Without dead ends: 3624 [2022-11-16 11:54:41,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:54:41,670 INFO L413 NwaCegarLoop]: 1720 mSDtfsCounter, 150 mSDsluCounter, 5027 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 6747 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:41,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 6747 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:54:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2022-11-16 11:54:41,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 3590. [2022-11-16 11:54:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3590 states, 2874 states have (on average 1.3865692414752957) internal successors, (3985), 2893 states have internal predecessors, (3985), 594 states have call successors, (594), 111 states have call predecessors, (594), 121 states have return successors, (844), 606 states have call predecessors, (844), 593 states have call successors, (844) [2022-11-16 11:54:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 5423 transitions. [2022-11-16 11:54:41,908 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 5423 transitions. Word has length 259 [2022-11-16 11:54:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:41,909 INFO L495 AbstractCegarLoop]: Abstraction has 3590 states and 5423 transitions. [2022-11-16 11:54:41,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:54:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 5423 transitions. [2022-11-16 11:54:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-16 11:54:41,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:41,922 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:41,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:42,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:54:42,123 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash 376441425, now seen corresponding path program 1 times [2022-11-16 11:54:42,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:42,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308838895] [2022-11-16 11:54:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:42,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:43,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:54:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:43,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:54:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:43,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:54:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:44,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:44,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:54:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:44,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:54:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:44,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 11:54:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:44,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:54:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:44,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:54:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:45,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:54:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:45,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:45,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:54:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:45,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:54:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:45,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2022-11-16 11:54:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2022-11-16 11:54:45,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:45,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308838895] [2022-11-16 11:54:45,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308838895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:45,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381040477] [2022-11-16 11:54:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:45,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:45,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:45,043 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:45,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:54:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:46,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2244 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:54:47,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:54:47,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:54:47,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381040477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:54:47,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:54:47,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-11-16 11:54:47,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805908921] [2022-11-16 11:54:47,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:54:47,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:54:47,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:47,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:54:47,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:54:47,949 INFO L87 Difference]: Start difference. First operand 3590 states and 5423 transitions. Second operand has 19 states, 18 states have (on average 8.944444444444445) internal successors, (161), 15 states have internal predecessors, (161), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-16 11:54:53,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:55:26,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:55:40,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:40,113 INFO L93 Difference]: Finished difference Result 8505 states and 13513 transitions. [2022-11-16 11:55:40,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 11:55:40,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 8.944444444444445) internal successors, (161), 15 states have internal predecessors, (161), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 262 [2022-11-16 11:55:40,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:40,152 INFO L225 Difference]: With dead ends: 8505 [2022-11-16 11:55:40,152 INFO L226 Difference]: Without dead ends: 5306 [2022-11-16 11:55:40,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 11:55:40,168 INFO L413 NwaCegarLoop]: 1473 mSDtfsCounter, 4873 mSDsluCounter, 12779 mSDsCounter, 0 mSdLazyCounter, 9536 mSolverCounterSat, 2177 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4961 SdHoareTripleChecker+Valid, 14252 SdHoareTripleChecker+Invalid, 11715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2177 IncrementalHoareTripleChecker+Valid, 9536 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:40,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4961 Valid, 14252 Invalid, 11715 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2177 Valid, 9536 Invalid, 2 Unknown, 0 Unchecked, 45.3s Time] [2022-11-16 11:55:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2022-11-16 11:55:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 3835. [2022-11-16 11:55:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3064 states have (on average 1.3841383812010444) internal successors, (4241), 3079 states have internal predecessors, (4241), 649 states have call successors, (649), 111 states have call predecessors, (649), 121 states have return successors, (954), 665 states have call predecessors, (954), 648 states have call successors, (954) [2022-11-16 11:55:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 5844 transitions. [2022-11-16 11:55:40,614 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 5844 transitions. Word has length 262 [2022-11-16 11:55:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:40,616 INFO L495 AbstractCegarLoop]: Abstraction has 3835 states and 5844 transitions. [2022-11-16 11:55:40,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 8.944444444444445) internal successors, (161), 15 states have internal predecessors, (161), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-16 11:55:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 5844 transitions. [2022-11-16 11:55:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-11-16 11:55:40,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:40,643 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 6, 6, 6, 6, 3, 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] [2022-11-16 11:55:40,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:55:40,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 11:55:40,857 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:40,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:40,857 INFO L85 PathProgramCache]: Analyzing trace with hash 61740457, now seen corresponding path program 1 times [2022-11-16 11:55:40,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:40,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853611982] [2022-11-16 11:55:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:40,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:41,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:55:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:41,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:55:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:41,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:55:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:55:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:55:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:55:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-16 11:55:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:55:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:55:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:55:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:55:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:55:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:55:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-11-16 11:55:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2089 trivial. 0 not checked. [2022-11-16 11:55:42,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:42,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853611982] [2022-11-16 11:55:42,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853611982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:55:42,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274391418] [2022-11-16 11:55:42,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:42,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:55:42,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:55:42,612 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:55:42,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:55:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:44,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 2264 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:55:44,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:55:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2087 trivial. 0 not checked. [2022-11-16 11:55:44,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:55:44,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274391418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:44,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:55:44,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-11-16 11:55:44,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270531836] [2022-11-16 11:55:44,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:44,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:55:44,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:55:44,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:55:44,887 INFO L87 Difference]: Start difference. First operand 3835 states and 5844 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:55:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:45,677 INFO L93 Difference]: Finished difference Result 7491 states and 11463 transitions. [2022-11-16 11:55:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:55:45,678 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), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 275 [2022-11-16 11:55:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:45,712 INFO L225 Difference]: With dead ends: 7491 [2022-11-16 11:55:45,713 INFO L226 Difference]: Without dead ends: 4047 [2022-11-16 11:55:45,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:55:45,734 INFO L413 NwaCegarLoop]: 1799 mSDtfsCounter, 136 mSDsluCounter, 3433 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 5232 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:45,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 5232 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:55:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2022-11-16 11:55:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3899. [2022-11-16 11:55:46,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3117 states have (on average 1.386268848251524) internal successors, (4321), 3128 states have internal predecessors, (4321), 660 states have call successors, (660), 111 states have call predecessors, (660), 121 states have return successors, (976), 680 states have call predecessors, (976), 659 states have call successors, (976) [2022-11-16 11:55:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 5957 transitions. [2022-11-16 11:55:46,089 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 5957 transitions. Word has length 275 [2022-11-16 11:55:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:46,089 INFO L495 AbstractCegarLoop]: Abstraction has 3899 states and 5957 transitions. [2022-11-16 11:55:46,089 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), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:55:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 5957 transitions. [2022-11-16 11:55:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-11-16 11:55:46,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:46,106 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 6, 6, 6, 6, 3, 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] [2022-11-16 11:55:46,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:55:46,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:55:46,307 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:46,307 INFO L85 PathProgramCache]: Analyzing trace with hash -212373594, now seen corresponding path program 1 times [2022-11-16 11:55:46,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:46,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832535251] [2022-11-16 11:55:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:46,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:55:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:55:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:55:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:55:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:55:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:55:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-16 11:55:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:55:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:55:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:55:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:55:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:55:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:55:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2022-11-16 11:55:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:55:47,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:47,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832535251] [2022-11-16 11:55:47,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832535251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:55:47,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787202027] [2022-11-16 11:55:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:47,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:55:47,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:55:47,572 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:55:47,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:55:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:49,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 2266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:55:49,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:55:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:55:49,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:55:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:55:50,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787202027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:55:50,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:55:50,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2022-11-16 11:55:50,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604870242] [2022-11-16 11:55:50,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:55:50,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:55:50,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:55:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:55:50,518 INFO L87 Difference]: Start difference. First operand 3899 states and 5957 transitions. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 17 states have internal predecessors, (155), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-16 11:55:54,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:55:56,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:56:14,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:56:20,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:20,093 INFO L93 Difference]: Finished difference Result 4850 states and 7791 transitions. [2022-11-16 11:56:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:56:20,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 17 states have internal predecessors, (155), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 276 [2022-11-16 11:56:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:20,127 INFO L225 Difference]: With dead ends: 4850 [2022-11-16 11:56:20,127 INFO L226 Difference]: Without dead ends: 4844 [2022-11-16 11:56:20,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:56:20,133 INFO L413 NwaCegarLoop]: 1430 mSDtfsCounter, 1465 mSDsluCounter, 5782 mSDsCounter, 0 mSdLazyCounter, 5220 mSolverCounterSat, 542 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 7212 SdHoareTripleChecker+Invalid, 5765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 5220 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:20,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1603 Valid, 7212 Invalid, 5765 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [542 Valid, 5220 Invalid, 3 Unknown, 0 Unchecked, 28.8s Time] [2022-11-16 11:56:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2022-11-16 11:56:20,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 3995. [2022-11-16 11:56:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3995 states, 3197 states have (on average 1.381607757272443) internal successors, (4417), 3208 states have internal predecessors, (4417), 676 states have call successors, (676), 111 states have call predecessors, (676), 121 states have return successors, (1008), 696 states have call predecessors, (1008), 675 states have call successors, (1008) [2022-11-16 11:56:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3995 states to 3995 states and 6101 transitions. [2022-11-16 11:56:20,431 INFO L78 Accepts]: Start accepts. Automaton has 3995 states and 6101 transitions. Word has length 276 [2022-11-16 11:56:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:20,431 INFO L495 AbstractCegarLoop]: Abstraction has 3995 states and 6101 transitions. [2022-11-16 11:56:20,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 17 states have internal predecessors, (155), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-16 11:56:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3995 states and 6101 transitions. [2022-11-16 11:56:20,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-11-16 11:56:20,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:20,455 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 14, 14, 14, 14, 3, 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] [2022-11-16 11:56:20,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:20,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:20,656 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:20,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:20,656 INFO L85 PathProgramCache]: Analyzing trace with hash -685069922, now seen corresponding path program 1 times [2022-11-16 11:56:20,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:20,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376939830] [2022-11-16 11:56:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:20,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:56:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:56:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:56:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:56:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:56:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:56:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:56:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:56:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:56:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:56:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:56:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:56:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:56:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-11-16 11:56:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:56:22,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:22,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376939830] [2022-11-16 11:56:22,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376939830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:22,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722805265] [2022-11-16 11:56:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:22,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:22,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:22,899 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:22,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:56:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:24,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:56:24,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:56:24,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:56:27,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722805265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:27,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:27,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 36 [2022-11-16 11:56:27,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968147043] [2022-11-16 11:56:27,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:27,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:56:27,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:27,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:56:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:56:27,193 INFO L87 Difference]: Start difference. First operand 3995 states and 6101 transitions. Second operand has 36 states, 36 states have (on average 6.111111111111111) internal successors, (220), 33 states have internal predecessors, (220), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-16 11:56:31,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:56:33,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:56:51,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:56:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:56,515 INFO L93 Difference]: Finished difference Result 5042 states and 8087 transitions. [2022-11-16 11:56:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 11:56:56,516 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.111111111111111) internal successors, (220), 33 states have internal predecessors, (220), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 309 [2022-11-16 11:56:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:56,540 INFO L225 Difference]: With dead ends: 5042 [2022-11-16 11:56:56,540 INFO L226 Difference]: Without dead ends: 5036 [2022-11-16 11:56:56,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:56:56,545 INFO L413 NwaCegarLoop]: 1427 mSDtfsCounter, 1578 mSDsluCounter, 5794 mSDsCounter, 0 mSdLazyCounter, 5413 mSolverCounterSat, 679 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1748 SdHoareTripleChecker+Valid, 7221 SdHoareTripleChecker+Invalid, 6095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 5413 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:56,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1748 Valid, 7221 Invalid, 6095 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [679 Valid, 5413 Invalid, 3 Unknown, 0 Unchecked, 28.5s Time] [2022-11-16 11:56:56,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2022-11-16 11:56:56,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 4187. [2022-11-16 11:56:56,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4187 states, 3357 states have (on average 1.3729520405123623) internal successors, (4609), 3368 states have internal predecessors, (4609), 708 states have call successors, (708), 111 states have call predecessors, (708), 121 states have return successors, (1072), 728 states have call predecessors, (1072), 707 states have call successors, (1072) [2022-11-16 11:56:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 6389 transitions. [2022-11-16 11:56:56,910 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 6389 transitions. Word has length 309 [2022-11-16 11:56:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:56,910 INFO L495 AbstractCegarLoop]: Abstraction has 4187 states and 6389 transitions. [2022-11-16 11:56:56,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.111111111111111) internal successors, (220), 33 states have internal predecessors, (220), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-16 11:56:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 6389 transitions. [2022-11-16 11:56:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-11-16 11:56:56,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:56,936 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 30, 30, 30, 30, 3, 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] [2022-11-16 11:56:56,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:57,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:57,137 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:57,137 INFO L85 PathProgramCache]: Analyzing trace with hash -299900808, now seen corresponding path program 1 times [2022-11-16 11:56:57,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:57,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943977681] [2022-11-16 11:56:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:57,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:57:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:57:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:57:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:57:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:57:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:57:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 11:57:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:57:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:57:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:57:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:57:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:57:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:57:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-11-16 11:57:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:57:01,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:01,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943977681] [2022-11-16 11:57:01,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943977681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:01,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171611609] [2022-11-16 11:57:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:01,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:01,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:01,537 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:01,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 11:57:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:02,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2498 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:57:02,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:57:03,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-16 11:57:07,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171611609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:07,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:07,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 38 [2022-11-16 11:57:07,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554718255] [2022-11-16 11:57:07,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:07,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:57:07,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:57:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:57:07,053 INFO L87 Difference]: Start difference. First operand 4187 states and 6389 transitions. Second operand has 38 states, 38 states have (on average 6.184210526315789) internal successors, (235), 35 states have internal predecessors, (235), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-16 11:57:11,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:57:13,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:57:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:30,021 INFO L93 Difference]: Finished difference Result 5066 states and 8109 transitions. [2022-11-16 11:57:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:57:30,022 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.184210526315789) internal successors, (235), 35 states have internal predecessors, (235), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 376 [2022-11-16 11:57:30,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:30,044 INFO L225 Difference]: With dead ends: 5066 [2022-11-16 11:57:30,044 INFO L226 Difference]: Without dead ends: 5060 [2022-11-16 11:57:30,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 813 GetRequests, 746 SyntacticMatches, 30 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:57:30,049 INFO L413 NwaCegarLoop]: 1430 mSDtfsCounter, 2474 mSDsluCounter, 5310 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 1424 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2650 SdHoareTripleChecker+Valid, 6740 SdHoareTripleChecker+Invalid, 5899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1424 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:30,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2650 Valid, 6740 Invalid, 5899 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1424 Valid, 4473 Invalid, 2 Unknown, 0 Unchecked, 22.1s Time] [2022-11-16 11:57:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2022-11-16 11:57:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 4211. [2022-11-16 11:57:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 3377 states have (on average 1.3719277465205804) internal successors, (4633), 3388 states have internal predecessors, (4633), 712 states have call successors, (712), 111 states have call predecessors, (712), 121 states have return successors, (1080), 732 states have call predecessors, (1080), 711 states have call successors, (1080) [2022-11-16 11:57:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 6425 transitions. [2022-11-16 11:57:30,338 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 6425 transitions. Word has length 376 [2022-11-16 11:57:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:30,339 INFO L495 AbstractCegarLoop]: Abstraction has 4211 states and 6425 transitions. [2022-11-16 11:57:30,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.184210526315789) internal successors, (235), 35 states have internal predecessors, (235), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-16 11:57:30,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 6425 transitions. [2022-11-16 11:57:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-11-16 11:57:30,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:30,369 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 3, 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] [2022-11-16 11:57:30,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:30,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-16 11:57:30,579 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1177910792, now seen corresponding path program 1 times [2022-11-16 11:57:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702060853] [2022-11-16 11:57:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:30,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:31,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:57:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:31,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:57:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:31,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:57:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:31,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:57:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:31,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:57:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:31,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:57:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:57:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:57:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:57:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:57:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:57:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:57:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:57:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2022-11-16 11:57:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4039 trivial. 0 not checked. [2022-11-16 11:57:32,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:32,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702060853] [2022-11-16 11:57:32,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702060853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:32,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836967040] [2022-11-16 11:57:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:32,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:32,157 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:32,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 11:57:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:33,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:57:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4037 trivial. 0 not checked. [2022-11-16 11:57:33,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:33,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836967040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:33,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:57:33,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 11 [2022-11-16 11:57:33,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214414835] [2022-11-16 11:57:33,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:33,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:33,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:33,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:33,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:57:33,663 INFO L87 Difference]: Start difference. First operand 4211 states and 6425 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:57:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:34,229 INFO L93 Difference]: Finished difference Result 8287 states and 12726 transitions. [2022-11-16 11:57:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:34,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 389 [2022-11-16 11:57:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:34,247 INFO L225 Difference]: With dead ends: 8287 [2022-11-16 11:57:34,247 INFO L226 Difference]: Without dead ends: 4467 [2022-11-16 11:57:34,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:57:34,261 INFO L413 NwaCegarLoop]: 1748 mSDtfsCounter, 92 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 3454 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:34,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 3454 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2022-11-16 11:57:34,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 4205. [2022-11-16 11:57:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4205 states, 3371 states have (on average 1.3708098487095817) internal successors, (4621), 3382 states have internal predecessors, (4621), 712 states have call successors, (712), 111 states have call predecessors, (712), 121 states have return successors, (1080), 732 states have call predecessors, (1080), 711 states have call successors, (1080) [2022-11-16 11:57:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4205 states to 4205 states and 6413 transitions. [2022-11-16 11:57:34,484 INFO L78 Accepts]: Start accepts. Automaton has 4205 states and 6413 transitions. Word has length 389 [2022-11-16 11:57:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:34,484 INFO L495 AbstractCegarLoop]: Abstraction has 4205 states and 6413 transitions. [2022-11-16 11:57:34,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:57:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4205 states and 6413 transitions. [2022-11-16 11:57:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-11-16 11:57:34,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:34,517 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 3, 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] [2022-11-16 11:57:34,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:34,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a03dac3-3633-4252-84b6-9e4c513405f5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 11:57:34,717 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash -432714782, now seen corresponding path program 2 times [2022-11-16 11:57:34,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:34,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336432013] [2022-11-16 11:57:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:34,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:35,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:57:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:35,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-16 11:57:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:35,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 11:57:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:57:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:57:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:57:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 11:57:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:57:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:57:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:57:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:57:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:57:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:57:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-11-16 11:57:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4043 trivial. 0 not checked. [2022-11-16 11:57:36,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:36,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336432013] [2022-11-16 11:57:36,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336432013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:36,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:36,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-16 11:57:36,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639036269] [2022-11-16 11:57:36,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:36,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:57:36,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:36,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:57:36,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:57:36,881 INFO L87 Difference]: Start difference. First operand 4205 states and 6413 transitions. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 10 states have internal predecessors, (102), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-16 11:57:40,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:58:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:04,715 INFO L93 Difference]: Finished difference Result 5548 states and 8837 transitions. [2022-11-16 11:58:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:58:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 10 states have internal predecessors, (102), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 384 [2022-11-16 11:58:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:04,718 INFO L225 Difference]: With dead ends: 5548 [2022-11-16 11:58:04,719 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 11:58:04,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:58:04,742 INFO L413 NwaCegarLoop]: 1235 mSDtfsCounter, 9510 mSDsluCounter, 3275 mSDsCounter, 0 mSdLazyCounter, 5534 mSolverCounterSat, 4312 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9600 SdHoareTripleChecker+Valid, 4510 SdHoareTripleChecker+Invalid, 9847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4312 IncrementalHoareTripleChecker+Valid, 5534 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:04,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9600 Valid, 4510 Invalid, 9847 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4312 Valid, 5534 Invalid, 1 Unknown, 0 Unchecked, 25.8s Time] [2022-11-16 11:58:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 11:58:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 11:58:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:04,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 11:58:04,744 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 384 [2022-11-16 11:58:04,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:04,744 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 11:58:04,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 10 states have internal predecessors, (102), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-16 11:58:04,744 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 11:58:04,744 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 11:58:04,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 11:58:04,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-16 11:58:04,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-16 11:58:10,038 WARN L233 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 47 DAG size of output: 46 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 11:58:15,261 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 47 DAG size of output: 46 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 11:59:27,488 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 47 DAG size of output: 46 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 11:59:46,887 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 47 DAG size of output: 46 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 11:59:52,400 WARN L233 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 47 DAG size of output: 46 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 11:59:57,764 WARN L233 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 47 DAG size of output: 46 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:00:02,941 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 47 DAG size of output: 46 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:00:22,314 WARN L233 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 47 DAG size of output: 46 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:00:27,579 WARN L233 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 47 DAG size of output: 46 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)