./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a379a11019678fc2a367efcf212f49fd3083d5f94e928c550866b32de723f686 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:42:41,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:42:41,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:42:41,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:42:41,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:42:41,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:42:41,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:42:41,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:42:41,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:42:41,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:42:41,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:42:41,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:42:41,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:42:41,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:42:41,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:42:41,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:42:41,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:42:41,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:42:41,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:42:41,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:42:41,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:42:41,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:42:41,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:42:41,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:42:41,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:42:41,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:42:41,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:42:41,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:42:41,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:42:41,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:42:41,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:42:41,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:42:41,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:42:41,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:42:41,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:42:41,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:42:41,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:42:41,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:42:41,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:42:41,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:42:41,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:42:41,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:42:41,902 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:42:41,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:42:41,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:42:41,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:42:41,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:42:41,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:42:41,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:42:41,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:42:41,909 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:42:41,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:42:41,909 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:42:41,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:42:41,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:42:41,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:42:41,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:42:41,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:42:41,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:42:41,911 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:42:41,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:42:41,911 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:42:41,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:42:41,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:42:41,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:42:41,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:42:41,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:42:41,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:42:41,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:42:41,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:42:41,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:42:41,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:42:41,914 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:42:41,914 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:42:41,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:42:41,914 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_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a379a11019678fc2a367efcf212f49fd3083d5f94e928c550866b32de723f686 [2022-11-18 18:42:42,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:42:42,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:42:42,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:42:42,253 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:42:42,254 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:42:42,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i [2022-11-18 18:42:42,325 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/data/8d8941bfa/d38c479bba64492ab72b99478bd11080/FLAG68e3270da [2022-11-18 18:42:43,037 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:42:43,038 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i [2022-11-18 18:42:43,063 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/data/8d8941bfa/d38c479bba64492ab72b99478bd11080/FLAG68e3270da [2022-11-18 18:42:43,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/data/8d8941bfa/d38c479bba64492ab72b99478bd11080 [2022-11-18 18:42:43,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:42:43,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:42:43,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:42:43,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:42:43,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:42:43,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:42:43" (1/1) ... [2022-11-18 18:42:43,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1431481d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:43, skipping insertion in model container [2022-11-18 18:42:43,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:42:43" (1/1) ... [2022-11-18 18:42:43,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:42:43,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:42:43,911 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i[33021,33034] [2022-11-18 18:42:44,074 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i[44590,44603] [2022-11-18 18:42:44,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:42:44,106 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:42:44,143 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i[33021,33034] [2022-11-18 18:42:44,226 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i[44590,44603] [2022-11-18 18:42:44,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:42:44,275 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:42:44,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44 WrapperNode [2022-11-18 18:42:44,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:42:44,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:42:44,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:42:44,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:42:44,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (1/1) ... [2022-11-18 18:42:44,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (1/1) ... [2022-11-18 18:42:44,435 INFO L138 Inliner]: procedures = 177, calls = 285, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1022 [2022-11-18 18:42:44,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:42:44,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:42:44,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:42:44,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:42:44,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (1/1) ... [2022-11-18 18:42:44,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (1/1) ... [2022-11-18 18:42:44,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (1/1) ... [2022-11-18 18:42:44,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (1/1) ... [2022-11-18 18:42:44,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (1/1) ... [2022-11-18 18:42:44,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (1/1) ... [2022-11-18 18:42:44,586 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (1/1) ... [2022-11-18 18:42:44,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (1/1) ... [2022-11-18 18:42:44,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:42:44,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:42:44,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:42:44,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:42:44,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (1/1) ... [2022-11-18 18:42:44,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:42:44,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:44,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:42:44,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:42:44,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:42:44,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 18:42:44,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 18:42:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:42:44,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-18 18:42:44,693 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-18 18:42:44,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 18:42:44,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:42:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 18:42:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:42:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-18 18:42:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 18:42:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:42:44,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:42:44,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:42:44,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:42:44,948 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:42:44,950 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:42:46,595 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:42:46,607 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:42:46,607 INFO L300 CfgBuilder]: Removed 63 assume(true) statements. [2022-11-18 18:42:46,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:42:46 BoogieIcfgContainer [2022-11-18 18:42:46,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:42:46,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:42:46,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:42:46,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:42:46,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:42:43" (1/3) ... [2022-11-18 18:42:46,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c495618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:42:46, skipping insertion in model container [2022-11-18 18:42:46,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:44" (2/3) ... [2022-11-18 18:42:46,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c495618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:42:46, skipping insertion in model container [2022-11-18 18:42:46,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:42:46" (3/3) ... [2022-11-18 18:42:46,623 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test3-1.i [2022-11-18 18:42:46,645 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:42:46,646 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 18:42:46,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:42:46,743 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;@3cec7f18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:42:46,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:42:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 200 states, 187 states have (on average 1.695187165775401) internal successors, (317), 194 states have internal predecessors, (317), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:42:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 18:42:46,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:42:46,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:46,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:42:46,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:46,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1311467126, now seen corresponding path program 1 times [2022-11-18 18:42:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:46,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626374206] [2022-11-18 18:42:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:46,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:46,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626374206] [2022-11-18 18:42:46,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626374206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:46,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:46,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:42:47,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058301058] [2022-11-18 18:42:47,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:47,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:42:47,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:42:47,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:42:47,062 INFO L87 Difference]: Start difference. First operand has 200 states, 187 states have (on average 1.695187165775401) internal successors, (317), 194 states have internal predecessors, (317), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:42:47,132 INFO L93 Difference]: Finished difference Result 398 states and 669 transitions. [2022-11-18 18:42:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:42:47,134 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 18:42:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:42:47,145 INFO L225 Difference]: With dead ends: 398 [2022-11-18 18:42:47,146 INFO L226 Difference]: Without dead ends: 196 [2022-11-18 18:42:47,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:42:47,153 INFO L413 NwaCegarLoop]: 264 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, 264 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:42:47,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:42:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-18 18:42:47,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-18 18:42:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 184 states have (on average 1.326086956521739) internal successors, (244), 190 states have internal predecessors, (244), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:42:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 260 transitions. [2022-11-18 18:42:47,205 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 260 transitions. Word has length 9 [2022-11-18 18:42:47,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:42:47,206 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 260 transitions. [2022-11-18 18:42:47,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:47,206 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 260 transitions. [2022-11-18 18:42:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:42:47,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:42:47,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:47,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:42:47,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:42:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:47,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1760313746, now seen corresponding path program 1 times [2022-11-18 18:42:47,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:47,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724606721] [2022-11-18 18:42:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:47,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:47,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:47,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724606721] [2022-11-18 18:42:47,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724606721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:47,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:47,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:42:47,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065783647] [2022-11-18 18:42:47,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:47,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:42:47,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:47,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:42:47,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:42:47,478 INFO L87 Difference]: Start difference. First operand 196 states and 260 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:42:48,021 INFO L93 Difference]: Finished difference Result 429 states and 578 transitions. [2022-11-18 18:42:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:42:48,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:42:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:42:48,026 INFO L225 Difference]: With dead ends: 429 [2022-11-18 18:42:48,026 INFO L226 Difference]: Without dead ends: 325 [2022-11-18 18:42:48,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:42:48,028 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 159 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:42:48,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 645 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:42:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-18 18:42:48,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 198. [2022-11-18 18:42:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.3225806451612903) internal successors, (246), 192 states have internal predecessors, (246), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:42:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 262 transitions. [2022-11-18 18:42:48,052 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 262 transitions. Word has length 14 [2022-11-18 18:42:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:42:48,052 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 262 transitions. [2022-11-18 18:42:48,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 262 transitions. [2022-11-18 18:42:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 18:42:48,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:42:48,055 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:48,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:42:48,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:42:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:48,057 INFO L85 PathProgramCache]: Analyzing trace with hash -803086662, now seen corresponding path program 1 times [2022-11-18 18:42:48,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:48,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999460628] [2022-11-18 18:42:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:48,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:48,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:42:48,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366096355] [2022-11-18 18:42:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:48,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:48,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:48,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:48,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:42:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:48,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:42:48,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:49,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:42:49,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:49,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999460628] [2022-11-18 18:42:49,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:42:49,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366096355] [2022-11-18 18:42:49,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366096355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:49,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:49,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:42:49,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742618315] [2022-11-18 18:42:49,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:49,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:42:49,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:49,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:42:49,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:42:49,014 INFO L87 Difference]: Start difference. First operand 198 states and 262 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:49,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:42:49,096 INFO L93 Difference]: Finished difference Result 413 states and 551 transitions. [2022-11-18 18:42:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:42:49,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-18 18:42:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:42:49,098 INFO L225 Difference]: With dead ends: 413 [2022-11-18 18:42:49,098 INFO L226 Difference]: Without dead ends: 219 [2022-11-18 18:42:49,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:42:49,101 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:42:49,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 465 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:42:49,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-18 18:42:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2022-11-18 18:42:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 206 states have (on average 1.2912621359223302) internal successors, (266), 212 states have internal predecessors, (266), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:42:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 282 transitions. [2022-11-18 18:42:49,114 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 282 transitions. Word has length 66 [2022-11-18 18:42:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:42:49,115 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 282 transitions. [2022-11-18 18:42:49,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 282 transitions. [2022-11-18 18:42:49,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 18:42:49,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:42:49,118 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:49,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:42:49,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-18 18:42:49,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:42:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash -449998280, now seen corresponding path program 1 times [2022-11-18 18:42:49,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:49,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230593007] [2022-11-18 18:42:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:49,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:49,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:42:49,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681545322] [2022-11-18 18:42:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:49,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:49,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:49,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:49,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:42:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:50,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:42:50,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:50,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:42:50,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230593007] [2022-11-18 18:42:50,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:42:50,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681545322] [2022-11-18 18:42:50,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681545322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:50,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:50,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:42:50,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158362007] [2022-11-18 18:42:50,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:50,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:42:50,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:50,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:42:50,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:42:50,358 INFO L87 Difference]: Start difference. First operand 218 states and 282 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:42:50,458 INFO L93 Difference]: Finished difference Result 424 states and 552 transitions. [2022-11-18 18:42:50,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:42:50,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-18 18:42:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:42:50,460 INFO L225 Difference]: With dead ends: 424 [2022-11-18 18:42:50,460 INFO L226 Difference]: Without dead ends: 210 [2022-11-18 18:42:50,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:42:50,464 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 230 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:42:50,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 493 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:42:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-18 18:42:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-11-18 18:42:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 192 states have (on average 1.2760416666666667) internal successors, (245), 198 states have internal predecessors, (245), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:42:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2022-11-18 18:42:50,494 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 66 [2022-11-18 18:42:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:42:50,494 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2022-11-18 18:42:50,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2022-11-18 18:42:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 18:42:50,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:42:50,496 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:50,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:42:50,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:50,697 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:42:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:50,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1020412346, now seen corresponding path program 1 times [2022-11-18 18:42:50,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:50,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752711284] [2022-11-18 18:42:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:50,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:50,845 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:42:50,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542175034] [2022-11-18 18:42:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:50,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:50,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:50,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:50,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:42:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:51,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:42:51,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:51,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:42:51,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:51,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752711284] [2022-11-18 18:42:51,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:42:51,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542175034] [2022-11-18 18:42:51,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542175034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:51,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:51,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:42:51,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54361792] [2022-11-18 18:42:51,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:51,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:42:51,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:51,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:42:51,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:42:51,910 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:42:52,022 INFO L93 Difference]: Finished difference Result 528 states and 680 transitions. [2022-11-18 18:42:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:42:52,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-18 18:42:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:42:52,025 INFO L225 Difference]: With dead ends: 528 [2022-11-18 18:42:52,025 INFO L226 Difference]: Without dead ends: 328 [2022-11-18 18:42:52,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:42:52,026 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 113 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:42:52,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 544 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:42:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-18 18:42:52,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 310. [2022-11-18 18:42:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 298 states have (on average 1.2684563758389262) internal successors, (378), 304 states have internal predecessors, (378), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:42:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 394 transitions. [2022-11-18 18:42:52,044 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 394 transitions. Word has length 66 [2022-11-18 18:42:52,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:42:52,047 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 394 transitions. [2022-11-18 18:42:52,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 394 transitions. [2022-11-18 18:42:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-18 18:42:52,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:42:52,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:52,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:42:52,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:52,272 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:42:52,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:52,272 INFO L85 PathProgramCache]: Analyzing trace with hash 822747892, now seen corresponding path program 1 times [2022-11-18 18:42:52,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:52,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020995167] [2022-11-18 18:42:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:52,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:52,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:42:52,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853009453] [2022-11-18 18:42:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:52,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:52,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:52,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:52,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:42:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:42:53,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:53,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 18:42:53,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 18:42:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:42:53,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:42:53,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:53,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020995167] [2022-11-18 18:42:53,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:42:53,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853009453] [2022-11-18 18:42:53,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853009453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:53,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:53,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:42:53,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801681980] [2022-11-18 18:42:53,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:53,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:42:53,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:53,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:42:53,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:42:53,081 INFO L87 Difference]: Start difference. First operand 310 states and 394 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:42:53,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:42:53,479 INFO L93 Difference]: Finished difference Result 425 states and 551 transitions. [2022-11-18 18:42:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:42:53,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 81 [2022-11-18 18:42:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:42:53,482 INFO L225 Difference]: With dead ends: 425 [2022-11-18 18:42:53,482 INFO L226 Difference]: Without dead ends: 404 [2022-11-18 18:42:53,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:42:53,483 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 103 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:42:53,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 666 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:42:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-18 18:42:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 312. [2022-11-18 18:42:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 300 states have (on average 1.2666666666666666) internal successors, (380), 306 states have internal predecessors, (380), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:42:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 396 transitions. [2022-11-18 18:42:53,500 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 396 transitions. Word has length 81 [2022-11-18 18:42:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:42:53,502 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 396 transitions. [2022-11-18 18:42:53,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:42:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 396 transitions. [2022-11-18 18:42:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-18 18:42:53,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:42:53,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:53,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:42:53,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:42:53,713 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:42:53,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1168454105, now seen corresponding path program 1 times [2022-11-18 18:42:53,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:53,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597437884] [2022-11-18 18:42:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:53,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:53,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:42:53,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715978645] [2022-11-18 18:42:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:53,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:53,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:53,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:53,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:42:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:54,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:42:54,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:42:54,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:42:54,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:54,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597437884] [2022-11-18 18:42:54,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:42:54,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715978645] [2022-11-18 18:42:54,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715978645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:54,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:54,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:42:54,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636293623] [2022-11-18 18:42:54,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:54,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:42:54,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:54,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:42:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:42:54,509 INFO L87 Difference]: Start difference. First operand 312 states and 396 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:42:54,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:42:54,588 INFO L93 Difference]: Finished difference Result 519 states and 682 transitions. [2022-11-18 18:42:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:42:54,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-11-18 18:42:54,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:42:54,591 INFO L225 Difference]: With dead ends: 519 [2022-11-18 18:42:54,591 INFO L226 Difference]: Without dead ends: 354 [2022-11-18 18:42:54,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:42:54,593 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 10 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:42:54,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 451 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:42:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-18 18:42:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2022-11-18 18:42:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 340 states have (on average 1.2352941176470589) internal successors, (420), 346 states have internal predecessors, (420), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:42:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 436 transitions. [2022-11-18 18:42:54,607 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 436 transitions. Word has length 111 [2022-11-18 18:42:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:42:54,607 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 436 transitions. [2022-11-18 18:42:54,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:42:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 436 transitions. [2022-11-18 18:42:54,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-18 18:42:54,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:42:54,609 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:54,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:42:54,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:54,817 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:42:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:54,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1449251797, now seen corresponding path program 1 times [2022-11-18 18:42:54,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:54,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392534275] [2022-11-18 18:42:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:54,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:54,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:42:54,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411930675] [2022-11-18 18:42:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:54,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:54,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:54,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:42:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:55,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:42:55,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:42:55,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:42:55,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:55,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392534275] [2022-11-18 18:42:55,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:42:55,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411930675] [2022-11-18 18:42:55,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411930675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:55,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:55,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:42:55,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534833737] [2022-11-18 18:42:55,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:55,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:42:55,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:55,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:42:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:42:55,633 INFO L87 Difference]: Start difference. First operand 352 states and 436 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:42:55,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:42:55,715 INFO L93 Difference]: Finished difference Result 534 states and 677 transitions. [2022-11-18 18:42:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:42:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-11-18 18:42:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:42:55,718 INFO L225 Difference]: With dead ends: 534 [2022-11-18 18:42:55,719 INFO L226 Difference]: Without dead ends: 329 [2022-11-18 18:42:55,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:42:55,720 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 122 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:42:55,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 577 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:42:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-18 18:42:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 324. [2022-11-18 18:42:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 312 states have (on average 1.2115384615384615) internal successors, (378), 318 states have internal predecessors, (378), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:42:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 394 transitions. [2022-11-18 18:42:55,734 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 394 transitions. Word has length 111 [2022-11-18 18:42:55,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:42:55,736 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 394 transitions. [2022-11-18 18:42:55,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:42:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 394 transitions. [2022-11-18 18:42:55,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-18 18:42:55,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:42:55,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:55,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:42:55,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:55,947 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:42:55,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:55,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1962866653, now seen corresponding path program 1 times [2022-11-18 18:42:55,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:55,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539473137] [2022-11-18 18:42:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:55,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:55,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:42:55,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757352475] [2022-11-18 18:42:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:55,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:55,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:55,999 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:56,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:42:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:56,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:42:56,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:42:56,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:42:56,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:56,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539473137] [2022-11-18 18:42:56,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:42:56,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757352475] [2022-11-18 18:42:56,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757352475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:56,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:56,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:42:56,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711610873] [2022-11-18 18:42:56,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:56,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:42:56,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:56,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:42:56,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:42:56,914 INFO L87 Difference]: Start difference. First operand 324 states and 394 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:42:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:42:57,201 INFO L93 Difference]: Finished difference Result 716 states and 892 transitions. [2022-11-18 18:42:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:42:57,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-11-18 18:42:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:42:57,204 INFO L225 Difference]: With dead ends: 716 [2022-11-18 18:42:57,204 INFO L226 Difference]: Without dead ends: 440 [2022-11-18 18:42:57,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:42:57,205 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 443 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:42:57,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 506 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:42:57,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-18 18:42:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 408. [2022-11-18 18:42:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 396 states have (on average 1.2171717171717171) internal successors, (482), 402 states have internal predecessors, (482), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:42:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 498 transitions. [2022-11-18 18:42:57,224 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 498 transitions. Word has length 111 [2022-11-18 18:42:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:42:57,224 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 498 transitions. [2022-11-18 18:42:57,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 18:42:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 498 transitions. [2022-11-18 18:42:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-18 18:42:57,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:42:57,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:57,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:42:57,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:57,444 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:42:57,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:57,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1528774636, now seen corresponding path program 1 times [2022-11-18 18:42:57,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:57,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661662277] [2022-11-18 18:42:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:57,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:57,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:42:57,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372668049] [2022-11-18 18:42:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:57,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:57,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:57,501 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:57,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:43:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:19,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:43:19,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:19,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:43:19,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:19,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661662277] [2022-11-18 18:43:19,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:43:19,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372668049] [2022-11-18 18:43:19,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372668049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:19,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:19,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:43:19,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49948727] [2022-11-18 18:43:19,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:19,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:43:19,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:19,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:43:19,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:43:19,707 INFO L87 Difference]: Start difference. First operand 408 states and 498 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:43:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:43:19,750 INFO L93 Difference]: Finished difference Result 768 states and 945 transitions. [2022-11-18 18:43:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:43:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-11-18 18:43:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:43:19,753 INFO L225 Difference]: With dead ends: 768 [2022-11-18 18:43:19,753 INFO L226 Difference]: Without dead ends: 411 [2022-11-18 18:43:19,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:43:19,755 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 2 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:43:19,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 725 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:43:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-11-18 18:43:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2022-11-18 18:43:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 398 states have (on average 1.2185929648241205) internal successors, (485), 405 states have internal predecessors, (485), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 18:43:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 502 transitions. [2022-11-18 18:43:19,775 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 502 transitions. Word has length 118 [2022-11-18 18:43:19,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:43:19,775 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 502 transitions. [2022-11-18 18:43:19,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:43:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 502 transitions. [2022-11-18 18:43:19,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-18 18:43:19,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:43:19,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:19,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:19,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:43:19,999 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:43:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:19,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2079236494, now seen corresponding path program 1 times [2022-11-18 18:43:20,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:20,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559170406] [2022-11-18 18:43:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:20,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:20,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:43:20,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040477274] [2022-11-18 18:43:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:20,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:20,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:20,057 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:20,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:43:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:51,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:43:51,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:43:51,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:43:52,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:52,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559170406] [2022-11-18 18:43:52,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:43:52,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040477274] [2022-11-18 18:43:52,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040477274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:52,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:43:52,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-18 18:43:52,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787135925] [2022-11-18 18:43:52,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:52,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:43:52,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:52,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:43:52,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:43:52,079 INFO L87 Difference]: Start difference. First operand 411 states and 502 transitions. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:43:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:43:52,231 INFO L93 Difference]: Finished difference Result 782 states and 967 transitions. [2022-11-18 18:43:52,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:43:52,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 120 [2022-11-18 18:43:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:43:52,233 INFO L225 Difference]: With dead ends: 782 [2022-11-18 18:43:52,234 INFO L226 Difference]: Without dead ends: 422 [2022-11-18 18:43:52,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:43:52,235 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 24 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:43:52,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 726 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:43:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-18 18:43:52,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-11-18 18:43:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 406 states have (on average 1.229064039408867) internal successors, (499), 413 states have internal predecessors, (499), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-18 18:43:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 517 transitions. [2022-11-18 18:43:52,254 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 517 transitions. Word has length 120 [2022-11-18 18:43:52,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:43:52,254 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 517 transitions. [2022-11-18 18:43:52,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:43:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 517 transitions. [2022-11-18 18:43:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-18 18:43:52,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:43:52,257 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:52,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:52,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:43:52,471 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:43:52,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1072056788, now seen corresponding path program 2 times [2022-11-18 18:43:52,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:52,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361481307] [2022-11-18 18:43:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:52,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:52,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:43:52,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075231647] [2022-11-18 18:43:52,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:43:52,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:52,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:52,530 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:52,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:43:53,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:43:53,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:43:53,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 18:43:53,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 18:43:53,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 18:43:54,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:54,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361481307] [2022-11-18 18:43:54,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:43:54,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075231647] [2022-11-18 18:43:54,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075231647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:54,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:43:54,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2022-11-18 18:43:54,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187712620] [2022-11-18 18:43:54,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:54,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:43:54,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:43:54,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:43:54,142 INFO L87 Difference]: Start difference. First operand 420 states and 517 transitions. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:43:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:43:54,531 INFO L93 Difference]: Finished difference Result 795 states and 985 transitions. [2022-11-18 18:43:54,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:43:54,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2022-11-18 18:43:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:43:54,535 INFO L225 Difference]: With dead ends: 795 [2022-11-18 18:43:54,536 INFO L226 Difference]: Without dead ends: 426 [2022-11-18 18:43:54,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:43:54,537 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 30 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:43:54,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1658 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:43:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-18 18:43:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 424. [2022-11-18 18:43:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 410 states have (on average 1.226829268292683) internal successors, (503), 417 states have internal predecessors, (503), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 18:43:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 520 transitions. [2022-11-18 18:43:54,569 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 520 transitions. Word has length 124 [2022-11-18 18:43:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:43:54,570 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 520 transitions. [2022-11-18 18:43:54,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:43:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 520 transitions. [2022-11-18 18:43:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-18 18:43:54,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:43:54,572 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:54,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:54,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 18:43:54,783 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:43:54,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:54,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1882342572, now seen corresponding path program 3 times [2022-11-18 18:43:54,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:54,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587607368] [2022-11-18 18:43:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:54,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:54,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:43:54,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767324286] [2022-11-18 18:43:54,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:43:54,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:54,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:54,844 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:54,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82d30eb-4a93-49e9-88eb-18da12874a52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process