./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a --- 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-dbf71c6-m [2022-10-17 10:31:36,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:31:36,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:31:36,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:31:36,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:31:36,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:31:36,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:31:36,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:31:36,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:31:36,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:31:36,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:31:36,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:31:36,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:31:36,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:31:36,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:31:36,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:31:36,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:31:36,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:31:36,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:31:36,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:31:36,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:31:36,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:31:36,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:31:36,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:31:36,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:31:36,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:31:36,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:31:36,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:31:36,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:31:36,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:31:36,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:31:36,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:31:36,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:31:36,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:31:36,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:31:36,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:31:36,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:31:36,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:31:36,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:31:36,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:31:36,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:31:36,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:31:37,000 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:31:37,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:31:37,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:31:37,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:31:37,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:31:37,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:31:37,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:31:37,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:31:37,004 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:31:37,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:31:37,005 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:31:37,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:31:37,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:31:37,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:31:37,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:31:37,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:31:37,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:31:37,007 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:31:37,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:31:37,007 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:31:37,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:31:37,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:31:37,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:31:37,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:31:37,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:31:37,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:31:37,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:31:37,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:31:37,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:31:37,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:31:37,011 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:31:37,012 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:31:37,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:31:37,012 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_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a [2022-10-17 10:31:37,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:31:37,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:31:37,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:31:37,332 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:31:37,333 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:31:37,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2022-10-17 10:31:37,418 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/data/6b120c203/81203836caf045bfb3c9e376d719a7a4/FLAG7d085ed91 [2022-10-17 10:31:38,180 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:31:38,182 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2022-10-17 10:31:38,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/data/6b120c203/81203836caf045bfb3c9e376d719a7a4/FLAG7d085ed91 [2022-10-17 10:31:38,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/data/6b120c203/81203836caf045bfb3c9e376d719a7a4 [2022-10-17 10:31:38,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:31:38,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:31:38,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:31:38,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:31:38,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:31:38,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:31:38" (1/1) ... [2022-10-17 10:31:38,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19357a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:38, skipping insertion in model container [2022-10-17 10:31:38,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:31:38" (1/1) ... [2022-10-17 10:31:38,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:31:38,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:31:38,714 WARN L230 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_276dea40-2fe6-4adf-b440-4141d5cd3845/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2022-10-17 10:31:39,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:31:39,163 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:31:39,179 WARN L230 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_276dea40-2fe6-4adf-b440-4141d5cd3845/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2022-10-17 10:31:39,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:31:39,392 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:31:39,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39 WrapperNode [2022-10-17 10:31:39,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:31:39,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:31:39,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:31:39,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:31:39,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (1/1) ... [2022-10-17 10:31:39,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (1/1) ... [2022-10-17 10:31:39,548 INFO L138 Inliner]: procedures = 92, calls = 344, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 839 [2022-10-17 10:31:39,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:31:39,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:31:39,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:31:39,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:31:39,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (1/1) ... [2022-10-17 10:31:39,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (1/1) ... [2022-10-17 10:31:39,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (1/1) ... [2022-10-17 10:31:39,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (1/1) ... [2022-10-17 10:31:39,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (1/1) ... [2022-10-17 10:31:39,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (1/1) ... [2022-10-17 10:31:39,670 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (1/1) ... [2022-10-17 10:31:39,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (1/1) ... [2022-10-17 10:31:39,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:31:39,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:31:39,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:31:39,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:31:39,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (1/1) ... [2022-10-17 10:31:39,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:31:39,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:39,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:31:39,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:31:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-10-17 10:31:39,858 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-10-17 10:31:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:31:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-10-17 10:31:39,858 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-10-17 10:31:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-10-17 10:31:39,859 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-10-17 10:31:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-10-17 10:31:39,859 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-10-17 10:31:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-10-17 10:31:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-10-17 10:31:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-10-17 10:31:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-10-17 10:31:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-10-17 10:31:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-10-17 10:31:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-10-17 10:31:39,862 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-10-17 10:31:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 10:31:39,892 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 10:31:39,893 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 10:31:39,893 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 10:31:39,893 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-10-17 10:31:39,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-10-17 10:31:39,893 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-10-17 10:31:39,894 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-10-17 10:31:39,894 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-10-17 10:31:39,894 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-10-17 10:31:39,894 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-10-17 10:31:39,894 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-10-17 10:31:39,894 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-10-17 10:31:39,895 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-10-17 10:31:39,895 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-10-17 10:31:39,895 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-10-17 10:31:39,895 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-10-17 10:31:39,896 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-10-17 10:31:39,896 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-10-17 10:31:39,896 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-10-17 10:31:39,896 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-10-17 10:31:39,897 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-10-17 10:31:39,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:31:39,897 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-10-17 10:31:39,897 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-10-17 10:31:39,898 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-10-17 10:31:39,898 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-10-17 10:31:39,898 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-10-17 10:31:39,898 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-10-17 10:31:39,899 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-10-17 10:31:39,899 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-10-17 10:31:39,899 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-10-17 10:31:39,899 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-10-17 10:31:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-10-17 10:31:39,900 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-10-17 10:31:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:31:39,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:31:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-10-17 10:31:39,902 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-10-17 10:31:40,157 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:31:40,160 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:31:41,754 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:31:41,771 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:31:41,771 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 10:31:41,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:31:41 BoogieIcfgContainer [2022-10-17 10:31:41,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:31:41,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:31:41,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:31:41,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:31:41,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:31:38" (1/3) ... [2022-10-17 10:31:41,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e91bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:31:41, skipping insertion in model container [2022-10-17 10:31:41,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:31:39" (2/3) ... [2022-10-17 10:31:41,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e91bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:31:41, skipping insertion in model container [2022-10-17 10:31:41,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:31:41" (3/3) ... [2022-10-17 10:31:41,787 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2022-10-17 10:31:41,809 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:31:41,810 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:31:41,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:31:41,902 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;@61a3640e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:31:41,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:31:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 600 states, 470 states have (on average 1.6893617021276597) internal successors, (794), 490 states have internal predecessors, (794), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-10-17 10:31:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-10-17 10:31:41,961 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:41,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:41,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:41,969 INFO L85 PathProgramCache]: Analyzing trace with hash 758163300, now seen corresponding path program 1 times [2022-10-17 10:31:41,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:41,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220445562] [2022-10-17 10:31:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:41,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:31:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:31:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:42,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-10-17 10:31:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:43,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-10-17 10:31:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:43,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-10-17 10:31:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:43,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-10-17 10:31:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:31:43,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:43,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220445562] [2022-10-17 10:31:43,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220445562] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:43,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81754711] [2022-10-17 10:31:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:43,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:43,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:43,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:43,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:31:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:43,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 10:31:43,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:31:43,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:43,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81754711] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:43,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:43,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2022-10-17 10:31:43,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496656534] [2022-10-17 10:31:43,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:43,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:31:43,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:43,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:31:43,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:43,590 INFO L87 Difference]: Start difference. First operand has 600 states, 470 states have (on average 1.6893617021276597) internal successors, (794), 490 states have internal predecessors, (794), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:31:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:43,742 INFO L93 Difference]: Finished difference Result 1178 states and 1979 transitions. [2022-10-17 10:31:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:31:43,745 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2022-10-17 10:31:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:43,780 INFO L225 Difference]: With dead ends: 1178 [2022-10-17 10:31:43,780 INFO L226 Difference]: Without dead ends: 590 [2022-10-17 10:31:43,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:43,801 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:43,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:31:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-10-17 10:31:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2022-10-17 10:31:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 463 states have (on average 1.6717062634989202) internal successors, (774), 481 states have internal predecessors, (774), 102 states have call successors, (102), 26 states have call predecessors, (102), 24 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-10-17 10:31:43,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 975 transitions. [2022-10-17 10:31:43,937 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 975 transitions. Word has length 83 [2022-10-17 10:31:43,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:43,939 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 975 transitions. [2022-10-17 10:31:43,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:31:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 975 transitions. [2022-10-17 10:31:43,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-10-17 10:31:43,947 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:43,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:43,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:44,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 10:31:44,177 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1565127940, now seen corresponding path program 1 times [2022-10-17 10:31:44,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:44,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607760671] [2022-10-17 10:31:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:44,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:31:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:31:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-10-17 10:31:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-10-17 10:31:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-10-17 10:31:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-10-17 10:31:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:31:44,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:44,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607760671] [2022-10-17 10:31:44,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607760671] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:44,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542325817] [2022-10-17 10:31:44,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:44,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:44,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:44,840 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:44,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:31:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:45,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:31:45,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-17 10:31:45,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:45,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542325817] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:45,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:45,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-10-17 10:31:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029381604] [2022-10-17 10:31:45,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:45,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:45,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:45,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:31:45,315 INFO L87 Difference]: Start difference. First operand 590 states and 975 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:31:45,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:45,523 INFO L93 Difference]: Finished difference Result 1181 states and 1958 transitions. [2022-10-17 10:31:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2022-10-17 10:31:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:45,536 INFO L225 Difference]: With dead ends: 1181 [2022-10-17 10:31:45,536 INFO L226 Difference]: Without dead ends: 599 [2022-10-17 10:31:45,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:31:45,545 INFO L413 NwaCegarLoop]: 960 mSDtfsCounter, 26 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:45,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2871 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-10-17 10:31:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2022-10-17 10:31:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 471 states have (on average 1.673036093418259) internal successors, (788), 489 states have internal predecessors, (788), 102 states have call successors, (102), 27 states have call predecessors, (102), 25 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-10-17 10:31:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 989 transitions. [2022-10-17 10:31:45,618 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 989 transitions. Word has length 83 [2022-10-17 10:31:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:45,619 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 989 transitions. [2022-10-17 10:31:45,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:31:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 989 transitions. [2022-10-17 10:31:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-17 10:31:45,624 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:45,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:45,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:45,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-10-17 10:31:45,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:45,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1064925813, now seen corresponding path program 1 times [2022-10-17 10:31:45,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:45,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124163383] [2022-10-17 10:31:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:31:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:31:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:31:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-10-17 10:31:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-10-17 10:31:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-10-17 10:31:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-10-17 10:31:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-10-17 10:31:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-17 10:31:46,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:46,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124163383] [2022-10-17 10:31:46,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124163383] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:46,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853849007] [2022-10-17 10:31:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:46,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:46,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:46,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:46,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:31:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:47,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:31:47,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:31:47,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:47,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853849007] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:47,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:47,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-10-17 10:31:47,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553934153] [2022-10-17 10:31:47,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:47,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:31:47,166 INFO L87 Difference]: Start difference. First operand 599 states and 989 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-10-17 10:31:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:47,456 INFO L93 Difference]: Finished difference Result 1233 states and 2053 transitions. [2022-10-17 10:31:47,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:47,457 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 101 [2022-10-17 10:31:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:47,469 INFO L225 Difference]: With dead ends: 1233 [2022-10-17 10:31:47,469 INFO L226 Difference]: Without dead ends: 644 [2022-10-17 10:31:47,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:31:47,478 INFO L413 NwaCegarLoop]: 922 mSDtfsCounter, 170 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2715 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:47,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 2715 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:31:47,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-10-17 10:31:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 644. [2022-10-17 10:31:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 515 states have (on average 1.6932038834951457) internal successors, (872), 533 states have internal predecessors, (872), 102 states have call successors, (102), 28 states have call predecessors, (102), 26 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-10-17 10:31:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1073 transitions. [2022-10-17 10:31:47,550 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1073 transitions. Word has length 101 [2022-10-17 10:31:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:47,550 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 1073 transitions. [2022-10-17 10:31:47,551 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-10-17 10:31:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1073 transitions. [2022-10-17 10:31:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-10-17 10:31:47,555 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:47,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:47,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:47,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:47,769 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:47,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1102384449, now seen corresponding path program 1 times [2022-10-17 10:31:47,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:47,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067144702] [2022-10-17 10:31:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:47,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:47,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:31:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-17 10:31:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:31:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 10:31:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:31:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-10-17 10:31:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-10-17 10:31:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-10-17 10:31:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 10:31:48,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067144702] [2022-10-17 10:31:48,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067144702] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159589487] [2022-10-17 10:31:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:48,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:48,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:48,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:48,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:31:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:48,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:31:48,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:31:48,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:48,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159589487] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:48,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:48,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-10-17 10:31:48,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430116906] [2022-10-17 10:31:48,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:48,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:31:48,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:48,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:31:48,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:31:48,826 INFO L87 Difference]: Start difference. First operand 644 states and 1073 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 10:31:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:48,983 INFO L93 Difference]: Finished difference Result 1311 states and 2186 transitions. [2022-10-17 10:31:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:31:48,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2022-10-17 10:31:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:48,991 INFO L225 Difference]: With dead ends: 1311 [2022-10-17 10:31:48,992 INFO L226 Difference]: Without dead ends: 677 [2022-10-17 10:31:48,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:31:48,997 INFO L413 NwaCegarLoop]: 971 mSDtfsCounter, 118 mSDsluCounter, 4741 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 5712 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:48,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 5712 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-10-17 10:31:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 657. [2022-10-17 10:31:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 525 states have (on average 1.6895238095238094) internal successors, (887), 545 states have internal predecessors, (887), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (104), 97 states have call predecessors, (104), 100 states have call successors, (104) [2022-10-17 10:31:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1094 transitions. [2022-10-17 10:31:49,035 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1094 transitions. Word has length 103 [2022-10-17 10:31:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:49,036 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 1094 transitions. [2022-10-17 10:31:49,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 10:31:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1094 transitions. [2022-10-17 10:31:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-10-17 10:31:49,039 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:49,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:49,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:49,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:49,253 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:49,253 INFO L85 PathProgramCache]: Analyzing trace with hash -260810925, now seen corresponding path program 1 times [2022-10-17 10:31:49,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:49,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486455778] [2022-10-17 10:31:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:49,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:49,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:49,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:31:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:49,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-17 10:31:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:49,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:49,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:31:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:49,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-10-17 10:31:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:49,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-17 10:31:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:49,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-10-17 10:31:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:49,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-10-17 10:31:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 10:31:49,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:49,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486455778] [2022-10-17 10:31:49,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486455778] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:49,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144949726] [2022-10-17 10:31:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:49,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:49,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:49,588 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:49,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:31:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:49,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:31:49,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:31:49,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:49,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144949726] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:49,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:49,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-10-17 10:31:49,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181901788] [2022-10-17 10:31:49,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:49,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:31:49,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:49,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:31:49,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:31:49,942 INFO L87 Difference]: Start difference. First operand 657 states and 1094 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:31:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:50,090 INFO L93 Difference]: Finished difference Result 1331 states and 2217 transitions. [2022-10-17 10:31:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:31:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2022-10-17 10:31:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:50,099 INFO L225 Difference]: With dead ends: 1331 [2022-10-17 10:31:50,099 INFO L226 Difference]: Without dead ends: 686 [2022-10-17 10:31:50,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:31:50,105 INFO L413 NwaCegarLoop]: 972 mSDtfsCounter, 129 mSDsluCounter, 4734 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 5706 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:50,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 5706 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-10-17 10:31:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 657. [2022-10-17 10:31:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 525 states have (on average 1.6895238095238094) internal successors, (887), 545 states have internal predecessors, (887), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (104), 97 states have call predecessors, (104), 100 states have call successors, (104) [2022-10-17 10:31:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1094 transitions. [2022-10-17 10:31:50,143 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1094 transitions. Word has length 88 [2022-10-17 10:31:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:50,144 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 1094 transitions. [2022-10-17 10:31:50,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:31:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1094 transitions. [2022-10-17 10:31:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-10-17 10:31:50,148 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:50,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:50,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:50,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:50,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:50,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:50,373 INFO L85 PathProgramCache]: Analyzing trace with hash 750962120, now seen corresponding path program 1 times [2022-10-17 10:31:50,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:50,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617915860] [2022-10-17 10:31:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:50,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 10:31:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-17 10:31:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:31:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-10-17 10:31:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-10-17 10:31:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-10-17 10:31:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-10-17 10:31:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-10-17 10:31:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 10:31:50,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:50,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617915860] [2022-10-17 10:31:50,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617915860] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:50,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430355000] [2022-10-17 10:31:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:50,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:50,870 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:50,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:31:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:51,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:31:51,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-10-17 10:31:51,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:51,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430355000] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:51,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:51,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-10-17 10:31:51,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040088869] [2022-10-17 10:31:51,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:51,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:51,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:51,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:51,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:31:51,207 INFO L87 Difference]: Start difference. First operand 657 states and 1094 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-10-17 10:31:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:51,294 INFO L93 Difference]: Finished difference Result 1317 states and 2194 transitions. [2022-10-17 10:31:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:51,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 104 [2022-10-17 10:31:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:51,302 INFO L225 Difference]: With dead ends: 1317 [2022-10-17 10:31:51,302 INFO L226 Difference]: Without dead ends: 668 [2022-10-17 10:31:51,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:31:51,309 INFO L413 NwaCegarLoop]: 961 mSDtfsCounter, 20 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2872 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:51,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2872 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:31:51,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-10-17 10:31:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 666. [2022-10-17 10:31:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 533 states have (on average 1.6810506566604129) internal successors, (896), 553 states have internal predecessors, (896), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2022-10-17 10:31:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1102 transitions. [2022-10-17 10:31:51,345 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1102 transitions. Word has length 104 [2022-10-17 10:31:51,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:51,347 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1102 transitions. [2022-10-17 10:31:51,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-10-17 10:31:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1102 transitions. [2022-10-17 10:31:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-10-17 10:31:51,351 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:51,351 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:51,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:51,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:31:51,564 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:51,565 INFO L85 PathProgramCache]: Analyzing trace with hash -198797179, now seen corresponding path program 1 times [2022-10-17 10:31:51,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:51,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911541179] [2022-10-17 10:31:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:51,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:51,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:51,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:31:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:51,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 10:31:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:51,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:51,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:31:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-17 10:31:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-10-17 10:31:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-10-17 10:31:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-10-17 10:31:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-10-17 10:31:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 10:31:52,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911541179] [2022-10-17 10:31:52,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911541179] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714573924] [2022-10-17 10:31:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:52,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:52,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:52,149 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:52,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:31:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:52,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:31:52,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:31:52,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:52,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714573924] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:52,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:52,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-10-17 10:31:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469812807] [2022-10-17 10:31:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:31:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:52,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:31:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:31:52,543 INFO L87 Difference]: Start difference. First operand 666 states and 1102 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 10:31:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:52,711 INFO L93 Difference]: Finished difference Result 1340 states and 2220 transitions. [2022-10-17 10:31:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:31:52,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 105 [2022-10-17 10:31:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:52,720 INFO L225 Difference]: With dead ends: 1340 [2022-10-17 10:31:52,720 INFO L226 Difference]: Without dead ends: 697 [2022-10-17 10:31:52,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:31:52,725 INFO L413 NwaCegarLoop]: 966 mSDtfsCounter, 140 mSDsluCounter, 4694 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 5660 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:52,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 5660 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-10-17 10:31:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 666. [2022-10-17 10:31:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 533 states have (on average 1.6810506566604129) internal successors, (896), 553 states have internal predecessors, (896), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2022-10-17 10:31:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1102 transitions. [2022-10-17 10:31:52,786 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1102 transitions. Word has length 105 [2022-10-17 10:31:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:52,786 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1102 transitions. [2022-10-17 10:31:52,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 10:31:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1102 transitions. [2022-10-17 10:31:52,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-10-17 10:31:52,791 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:52,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:52,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:53,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:53,012 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:53,012 INFO L85 PathProgramCache]: Analyzing trace with hash 672369264, now seen corresponding path program 1 times [2022-10-17 10:31:53,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:53,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750896600] [2022-10-17 10:31:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:53,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:53,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:53,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:31:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:53,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 10:31:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:53,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:53,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:31:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:53,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:53,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-10-17 10:31:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:53,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-10-17 10:31:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-10-17 10:31:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 10:31:53,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:53,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750896600] [2022-10-17 10:31:53,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750896600] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:53,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903846043] [2022-10-17 10:31:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:53,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:53,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:53,352 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:53,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:31:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:53,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:31:53,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:31:53,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:53,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903846043] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:53,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:53,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-10-17 10:31:53,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375954032] [2022-10-17 10:31:53,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:53,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:31:53,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:53,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:31:53,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:31:53,722 INFO L87 Difference]: Start difference. First operand 666 states and 1102 transitions. Second operand has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:31:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:53,937 INFO L93 Difference]: Finished difference Result 1343 states and 2224 transitions. [2022-10-17 10:31:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:31:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 89 [2022-10-17 10:31:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:53,945 INFO L225 Difference]: With dead ends: 1343 [2022-10-17 10:31:53,945 INFO L226 Difference]: Without dead ends: 700 [2022-10-17 10:31:53,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:31:53,951 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 140 mSDsluCounter, 5628 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 6584 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:53,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 6584 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-10-17 10:31:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 666. [2022-10-17 10:31:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 533 states have (on average 1.6810506566604129) internal successors, (896), 553 states have internal predecessors, (896), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2022-10-17 10:31:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1102 transitions. [2022-10-17 10:31:53,999 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1102 transitions. Word has length 89 [2022-10-17 10:31:54,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:54,000 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1102 transitions. [2022-10-17 10:31:54,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:31:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1102 transitions. [2022-10-17 10:31:54,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-10-17 10:31:54,004 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:54,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:54,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:54,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:31:54,220 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash 653145198, now seen corresponding path program 1 times [2022-10-17 10:31:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:54,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957155285] [2022-10-17 10:31:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:31:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-10-17 10:31:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:31:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-10-17 10:31:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-10-17 10:31:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-10-17 10:31:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-10-17 10:31:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-10-17 10:31:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 10:31:54,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:54,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957155285] [2022-10-17 10:31:54,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957155285] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:54,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392926683] [2022-10-17 10:31:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:54,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:54,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:54,767 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:54,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:31:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1508 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:31:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:31:55,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:55,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392926683] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:55,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:55,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-10-17 10:31:55,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717476058] [2022-10-17 10:31:55,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:55,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:31:55,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:55,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:31:55,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:31:55,188 INFO L87 Difference]: Start difference. First operand 666 states and 1102 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 10:31:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:55,412 INFO L93 Difference]: Finished difference Result 1343 states and 2224 transitions. [2022-10-17 10:31:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:31:55,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 106 [2022-10-17 10:31:55,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:55,421 INFO L225 Difference]: With dead ends: 1343 [2022-10-17 10:31:55,421 INFO L226 Difference]: Without dead ends: 700 [2022-10-17 10:31:55,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:31:55,428 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 150 mSDsluCounter, 5616 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 6572 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:55,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 6572 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-10-17 10:31:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 666. [2022-10-17 10:31:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 533 states have (on average 1.6810506566604129) internal successors, (896), 553 states have internal predecessors, (896), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2022-10-17 10:31:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1102 transitions. [2022-10-17 10:31:55,503 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1102 transitions. Word has length 106 [2022-10-17 10:31:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:55,504 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1102 transitions. [2022-10-17 10:31:55,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 10:31:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1102 transitions. [2022-10-17 10:31:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-10-17 10:31:55,508 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:55,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:55,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:55,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:55,723 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash -521611988, now seen corresponding path program 1 times [2022-10-17 10:31:55,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:55,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660171869] [2022-10-17 10:31:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:55,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:31:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:31:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:31:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:31:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-10-17 10:31:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-10-17 10:31:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-10-17 10:31:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-10-17 10:31:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 10:31:56,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:56,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660171869] [2022-10-17 10:31:56,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660171869] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:56,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094369814] [2022-10-17 10:31:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:56,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:56,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:56,273 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:56,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 10:31:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:56,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:31:56,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:31:56,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:56,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094369814] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:56,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:56,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-10-17 10:31:56,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567929746] [2022-10-17 10:31:56,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:56,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:31:56,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:56,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:31:56,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:31:56,697 INFO L87 Difference]: Start difference. First operand 666 states and 1102 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 10:31:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:56,944 INFO L93 Difference]: Finished difference Result 1334 states and 2209 transitions. [2022-10-17 10:31:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:31:56,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 107 [2022-10-17 10:31:56,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:56,952 INFO L225 Difference]: With dead ends: 1334 [2022-10-17 10:31:56,953 INFO L226 Difference]: Without dead ends: 691 [2022-10-17 10:31:56,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:31:56,957 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 160 mSDsluCounter, 5604 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 6560 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:56,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 6560 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-10-17 10:31:56,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 666. [2022-10-17 10:31:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 533 states have (on average 1.6810506566604129) internal successors, (896), 553 states have internal predecessors, (896), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2022-10-17 10:31:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1102 transitions. [2022-10-17 10:31:56,992 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1102 transitions. Word has length 107 [2022-10-17 10:31:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:56,993 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1102 transitions. [2022-10-17 10:31:56,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 10:31:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1102 transitions. [2022-10-17 10:31:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 10:31:56,997 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:56,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:57,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:57,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 10:31:57,220 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:57,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1019428749, now seen corresponding path program 1 times [2022-10-17 10:31:57,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:57,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539218456] [2022-10-17 10:31:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:57,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:57,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:57,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:31:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:57,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:31:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:57,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:57,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:31:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:57,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-10-17 10:31:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:57,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-10-17 10:31:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:57,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-10-17 10:31:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:57,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-17 10:31:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:31:57,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539218456] [2022-10-17 10:31:57,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539218456] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162055605] [2022-10-17 10:31:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:57,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:57,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:57,451 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:57,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 10:31:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:31:57,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 10:31:57,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:57,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162055605] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:57,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:57,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-10-17 10:31:57,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520085481] [2022-10-17 10:31:57,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:57,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:57,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:57,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:57,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:31:57,759 INFO L87 Difference]: Start difference. First operand 666 states and 1102 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:31:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:57,839 INFO L93 Difference]: Finished difference Result 1298 states and 2156 transitions. [2022-10-17 10:31:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2022-10-17 10:31:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:57,846 INFO L225 Difference]: With dead ends: 1298 [2022-10-17 10:31:57,847 INFO L226 Difference]: Without dead ends: 666 [2022-10-17 10:31:57,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:31:57,852 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 35 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:57,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 2870 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:31:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-10-17 10:31:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2022-10-17 10:31:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 533 states have (on average 1.6716697936210132) internal successors, (891), 553 states have internal predecessors, (891), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2022-10-17 10:31:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1097 transitions. [2022-10-17 10:31:57,883 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1097 transitions. Word has length 91 [2022-10-17 10:31:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:57,884 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1097 transitions. [2022-10-17 10:31:57,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:31:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1097 transitions. [2022-10-17 10:31:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-10-17 10:31:57,888 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:57,888 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:57,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:58,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:58,105 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:58,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1412497752, now seen corresponding path program 1 times [2022-10-17 10:31:58,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:58,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444380820] [2022-10-17 10:31:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:58,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:58,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:58,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:31:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:58,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:31:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:58,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:58,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:31:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:58,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-10-17 10:31:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:58,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-10-17 10:31:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:58,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-10-17 10:31:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:58,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-10-17 10:31:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 10:31:58,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:58,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444380820] [2022-10-17 10:31:58,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444380820] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:58,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652433056] [2022-10-17 10:31:58,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:58,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:58,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:58,491 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:58,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-17 10:31:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:58,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:31:58,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:31:58,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:58,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652433056] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:58,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:58,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-10-17 10:31:58,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860587521] [2022-10-17 10:31:58,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:58,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:58,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:58,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:58,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:31:58,836 INFO L87 Difference]: Start difference. First operand 666 states and 1097 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:31:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:59,011 INFO L93 Difference]: Finished difference Result 1294 states and 2147 transitions. [2022-10-17 10:31:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:59,012 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 92 [2022-10-17 10:31:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:59,018 INFO L225 Difference]: With dead ends: 1294 [2022-10-17 10:31:59,019 INFO L226 Difference]: Without dead ends: 720 [2022-10-17 10:31:59,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:31:59,024 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 241 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 2704 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:59,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 2704 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-10-17 10:31:59,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 711. [2022-10-17 10:31:59,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 577 states have (on average 1.6897746967071057) internal successors, (975), 597 states have internal predecessors, (975), 103 states have call successors, (103), 30 states have call predecessors, (103), 30 states have return successors, (102), 97 states have call predecessors, (102), 100 states have call successors, (102) [2022-10-17 10:31:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1180 transitions. [2022-10-17 10:31:59,056 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1180 transitions. Word has length 92 [2022-10-17 10:31:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:59,057 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 1180 transitions. [2022-10-17 10:31:59,057 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:31:59,058 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1180 transitions. [2022-10-17 10:31:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-10-17 10:31:59,063 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:59,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:31:59,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:59,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:59,277 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:31:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:59,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1539448053, now seen corresponding path program 1 times [2022-10-17 10:31:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:59,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942040343] [2022-10-17 10:31:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:59,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:31:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:59,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:31:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:59,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:31:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:59,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:31:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:59,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:31:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:59,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-10-17 10:31:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:59,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-10-17 10:31:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:59,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-10-17 10:31:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:59,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-10-17 10:31:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 10:31:59,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:59,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942040343] [2022-10-17 10:31:59,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942040343] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:59,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682584692] [2022-10-17 10:31:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:59,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:59,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:59,638 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:59,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-17 10:31:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:59,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:31:59,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 10:31:59,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:31:59,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682584692] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:59,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:31:59,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2022-10-17 10:31:59,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185064995] [2022-10-17 10:31:59,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:59,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:31:59,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:59,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:32:00,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:32:00,000 INFO L87 Difference]: Start difference. First operand 711 states and 1180 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:32:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:32:00,177 INFO L93 Difference]: Finished difference Result 1320 states and 2183 transitions. [2022-10-17 10:32:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:32:00,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2022-10-17 10:32:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:32:00,185 INFO L225 Difference]: With dead ends: 1320 [2022-10-17 10:32:00,185 INFO L226 Difference]: Without dead ends: 746 [2022-10-17 10:32:00,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:32:00,190 INFO L413 NwaCegarLoop]: 961 mSDtfsCounter, 115 mSDsluCounter, 4699 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 5660 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:32:00,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 5660 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:32:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-10-17 10:32:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 724. [2022-10-17 10:32:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 587 states have (on average 1.686541737649063) internal successors, (990), 609 states have internal predecessors, (990), 104 states have call successors, (104), 30 states have call predecessors, (104), 32 states have return successors, (105), 98 states have call predecessors, (105), 101 states have call successors, (105) [2022-10-17 10:32:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1199 transitions. [2022-10-17 10:32:00,222 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1199 transitions. Word has length 93 [2022-10-17 10:32:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:32:00,223 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 1199 transitions. [2022-10-17 10:32:00,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:32:00,223 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1199 transitions. [2022-10-17 10:32:00,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-10-17 10:32:00,227 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:00,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:32:00,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-17 10:32:00,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 10:32:00,449 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:00,449 INFO L85 PathProgramCache]: Analyzing trace with hash -600539538, now seen corresponding path program 1 times [2022-10-17 10:32:00,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:00,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806210234] [2022-10-17 10:32:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:00,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:00,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:32:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:00,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:32:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:00,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:32:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:00,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:32:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:00,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:32:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:00,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-10-17 10:32:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:00,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-10-17 10:32:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:00,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-10-17 10:32:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:00,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-10-17 10:32:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:32:00,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806210234] [2022-10-17 10:32:00,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806210234] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:32:00,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876073514] [2022-10-17 10:32:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:00,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:00,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:00,771 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:32:00,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-17 10:32:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:01,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:32:01,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:32:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 10:32:01,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:32:01,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876073514] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:32:01,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:32:01,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-10-17 10:32:01,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816300235] [2022-10-17 10:32:01,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:32:01,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:32:01,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:32:01,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:32:01,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:32:01,129 INFO L87 Difference]: Start difference. First operand 724 states and 1199 transitions. Second operand has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:32:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:32:01,280 INFO L93 Difference]: Finished difference Result 1329 states and 2197 transitions. [2022-10-17 10:32:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:32:01,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 94 [2022-10-17 10:32:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:32:01,288 INFO L225 Difference]: With dead ends: 1329 [2022-10-17 10:32:01,288 INFO L226 Difference]: Without dead ends: 755 [2022-10-17 10:32:01,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:32:01,294 INFO L413 NwaCegarLoop]: 961 mSDtfsCounter, 126 mSDsluCounter, 4687 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 5648 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:32:01,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 5648 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:32:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-10-17 10:32:01,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 724. [2022-10-17 10:32:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 587 states have (on average 1.686541737649063) internal successors, (990), 609 states have internal predecessors, (990), 104 states have call successors, (104), 30 states have call predecessors, (104), 32 states have return successors, (105), 98 states have call predecessors, (105), 101 states have call successors, (105) [2022-10-17 10:32:01,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1199 transitions. [2022-10-17 10:32:01,327 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1199 transitions. Word has length 94 [2022-10-17 10:32:01,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:32:01,328 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 1199 transitions. [2022-10-17 10:32:01,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:32:01,328 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1199 transitions. [2022-10-17 10:32:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-10-17 10:32:01,332 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:01,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:32:01,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-17 10:32:01,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-17 10:32:01,556 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:01,556 INFO L85 PathProgramCache]: Analyzing trace with hash 447314670, now seen corresponding path program 1 times [2022-10-17 10:32:01,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:01,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687181444] [2022-10-17 10:32:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:01,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:01,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:32:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:01,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:32:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:01,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:32:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:01,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:32:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:01,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:32:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:01,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-10-17 10:32:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:01,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-10-17 10:32:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:01,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-10-17 10:32:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:01,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-10-17 10:32:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:32:01,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:01,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687181444] [2022-10-17 10:32:01,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687181444] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:32:01,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924427860] [2022-10-17 10:32:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:01,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:01,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:01,875 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:32:01,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-17 10:32:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:02,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:32:02,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:32:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 10:32:02,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:32:02,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924427860] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:32:02,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:32:02,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-10-17 10:32:02,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061206617] [2022-10-17 10:32:02,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:32:02,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:32:02,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:32:02,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:32:02,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:32:02,257 INFO L87 Difference]: Start difference. First operand 724 states and 1199 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:32:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:32:02,454 INFO L93 Difference]: Finished difference Result 1332 states and 2200 transitions. [2022-10-17 10:32:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:32:02,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 94 [2022-10-17 10:32:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:32:02,462 INFO L225 Difference]: With dead ends: 1332 [2022-10-17 10:32:02,463 INFO L226 Difference]: Without dead ends: 758 [2022-10-17 10:32:02,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:32:02,470 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 138 mSDsluCounter, 5604 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 6555 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:32:02,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 6555 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:32:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-10-17 10:32:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 724. [2022-10-17 10:32:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 587 states have (on average 1.686541737649063) internal successors, (990), 609 states have internal predecessors, (990), 104 states have call successors, (104), 30 states have call predecessors, (104), 32 states have return successors, (105), 98 states have call predecessors, (105), 101 states have call successors, (105) [2022-10-17 10:32:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1199 transitions. [2022-10-17 10:32:02,506 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1199 transitions. Word has length 94 [2022-10-17 10:32:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:32:02,507 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 1199 transitions. [2022-10-17 10:32:02,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:32:02,507 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1199 transitions. [2022-10-17 10:32:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-10-17 10:32:02,511 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:02,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:32:02,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-10-17 10:32:02,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-17 10:32:02,732 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:02,733 INFO L85 PathProgramCache]: Analyzing trace with hash -454179716, now seen corresponding path program 1 times [2022-10-17 10:32:02,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:02,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918916012] [2022-10-17 10:32:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:02,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:02,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:32:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:02,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:32:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:02,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:32:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:02,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:32:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:02,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:32:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:02,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-10-17 10:32:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:02,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-10-17 10:32:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:02,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-10-17 10:32:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:02,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-10-17 10:32:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:32:02,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:02,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918916012] [2022-10-17 10:32:02,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918916012] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:32:02,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51037808] [2022-10-17 10:32:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:02,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:02,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:02,977 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:32:02,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-17 10:32:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:03,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:32:03,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:32:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 10:32:03,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:32:03,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51037808] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:32:03,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:32:03,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-10-17 10:32:03,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861006298] [2022-10-17 10:32:03,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:32:03,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:32:03,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:32:03,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:32:03,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:32:03,297 INFO L87 Difference]: Start difference. First operand 724 states and 1199 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:32:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:32:03,369 INFO L93 Difference]: Finished difference Result 1374 states and 2279 transitions. [2022-10-17 10:32:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:32:03,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2022-10-17 10:32:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:32:03,378 INFO L225 Difference]: With dead ends: 1374 [2022-10-17 10:32:03,378 INFO L226 Difference]: Without dead ends: 724 [2022-10-17 10:32:03,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:32:03,385 INFO L413 NwaCegarLoop]: 961 mSDtfsCounter, 10 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2872 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:32:03,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2872 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:32:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-10-17 10:32:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 724. [2022-10-17 10:32:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 587 states have (on average 1.6814310051107326) internal successors, (987), 609 states have internal predecessors, (987), 104 states have call successors, (104), 30 states have call predecessors, (104), 32 states have return successors, (105), 98 states have call predecessors, (105), 101 states have call successors, (105) [2022-10-17 10:32:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1196 transitions. [2022-10-17 10:32:03,452 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1196 transitions. Word has length 94 [2022-10-17 10:32:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:32:03,453 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 1196 transitions. [2022-10-17 10:32:03,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:32:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1196 transitions. [2022-10-17 10:32:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-10-17 10:32:03,457 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:03,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2022-10-17 10:32:03,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-10-17 10:32:03,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-17 10:32:03,681 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:03,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1290889357, now seen corresponding path program 1 times [2022-10-17 10:32:03,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:03,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121277360] [2022-10-17 10:32:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:03,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:03,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:32:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:03,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:32:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:03,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:32:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:03,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:32:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:03,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:32:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:03,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-10-17 10:32:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:03,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-10-17 10:32:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:03,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-10-17 10:32:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:03,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-10-17 10:32:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:32:03,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:03,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121277360] [2022-10-17 10:32:03,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121277360] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:32:03,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58328786] [2022-10-17 10:32:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:03,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:03,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:03,965 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:32:03,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-10-17 10:32:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:04,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:32:04,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:32:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 10:32:04,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:32:04,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58328786] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:32:04,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:32:04,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-10-17 10:32:04,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057066137] [2022-10-17 10:32:04,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:32:04,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:32:04,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:32:04,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:32:04,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:32:04,332 INFO L87 Difference]: Start difference. First operand 724 states and 1196 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:32:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:32:04,551 INFO L93 Difference]: Finished difference Result 1323 states and 2183 transitions. [2022-10-17 10:32:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:32:04,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 95 [2022-10-17 10:32:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:32:04,560 INFO L225 Difference]: With dead ends: 1323 [2022-10-17 10:32:04,560 INFO L226 Difference]: Without dead ends: 749 [2022-10-17 10:32:04,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:32:04,565 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 148 mSDsluCounter, 5577 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 6525 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:32:04,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 6525 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:32:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-10-17 10:32:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 724. [2022-10-17 10:32:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 587 states have (on average 1.6814310051107326) internal successors, (987), 609 states have internal predecessors, (987), 104 states have call successors, (104), 30 states have call predecessors, (104), 32 states have return successors, (105), 98 states have call predecessors, (105), 101 states have call successors, (105) [2022-10-17 10:32:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1196 transitions. [2022-10-17 10:32:04,601 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1196 transitions. Word has length 95 [2022-10-17 10:32:04,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:32:04,601 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 1196 transitions. [2022-10-17 10:32:04,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:32:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1196 transitions. [2022-10-17 10:32:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-10-17 10:32:04,605 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:04,606 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:32:04,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-10-17 10:32:04,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:04,821 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:04,821 INFO L85 PathProgramCache]: Analyzing trace with hash 879670570, now seen corresponding path program 1 times [2022-10-17 10:32:04,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:04,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176788758] [2022-10-17 10:32:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:04,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:32:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:04,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:32:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:04,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:32:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:05,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:32:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:05,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:32:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:05,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-10-17 10:32:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:05,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 10:32:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:05,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-10-17 10:32:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:05,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-10-17 10:32:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:05,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-10-17 10:32:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:05,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-10-17 10:32:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:32:05,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:05,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176788758] [2022-10-17 10:32:05,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176788758] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:32:05,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822464611] [2022-10-17 10:32:05,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:05,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:05,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:05,312 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:32:05,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_276dea40-2fe6-4adf-b440-4141d5cd3845/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-10-17 10:32:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:05,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:32:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:32:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 10:32:05,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:32:05,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822464611] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:32:05,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:32:05,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2022-10-17 10:32:05,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928800466] [2022-10-17 10:32:05,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:32:05,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:32:05,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:32:05,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:32:05,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:32:05,915 INFO L87 Difference]: Start difference. First operand 724 states and 1196 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)