./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R --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 9e43379b3f2624d77eec1084820c7c07499f5ec4432514ab066d4f5cf96eeebc --- 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-38b53e6 [2022-11-25 15:51:44,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:51:44,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:51:44,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:51:44,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:51:44,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:51:44,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:51:45,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:51:45,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:51:45,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:51:45,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:51:45,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:51:45,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:51:45,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:51:45,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:51:45,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:51:45,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:51:45,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:51:45,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:51:45,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:51:45,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:51:45,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:51:45,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:51:45,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:51:45,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:51:45,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:51:45,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:51:45,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:51:45,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:51:45,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:51:45,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:51:45,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:51:45,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:51:45,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:51:45,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:51:45,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:51:45,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:51:45,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:51:45,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:51:45,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:51:45,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:51:45,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:51:45,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:51:45,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:51:45,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:51:45,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:51:45,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:51:45,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:51:45,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:51:45,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:51:45,105 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:51:45,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:51:45,106 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:51:45,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:51:45,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:51:45,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:51:45,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:51:45,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:51:45,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:51:45,108 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:51:45,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:51:45,109 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:51:45,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:51:45,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:51:45,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:51:45,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:51:45,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:51:45,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:51:45,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:51:45,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:51:45,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:51:45,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:51:45,112 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:51:45,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:51:45,112 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:51:45,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:51:45,113 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e43379b3f2624d77eec1084820c7c07499f5ec4432514ab066d4f5cf96eeebc [2022-11-25 15:51:45,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:51:45,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:51:45,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:51:45,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:51:45,470 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:51:45,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i [2022-11-25 15:51:48,400 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:51:48,843 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:51:48,845 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i [2022-11-25 15:51:48,871 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/data/fa122a5ac/42e5748ec2ad4bb8a3a0b2db0eef4c0a/FLAG0925836cc [2022-11-25 15:51:48,891 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/data/fa122a5ac/42e5748ec2ad4bb8a3a0b2db0eef4c0a [2022-11-25 15:51:48,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:51:48,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:51:48,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:51:48,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:51:48,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:51:48,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:51:48" (1/1) ... [2022-11-25 15:51:48,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a8784a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:48, skipping insertion in model container [2022-11-25 15:51:48,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:51:48" (1/1) ... [2022-11-25 15:51:48,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:51:48,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:51:49,500 WARN L237 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_5dce6178-21b1-4990-b79a-bb3a12916449/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[33021,33034] [2022-11-25 15:51:49,605 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 15:51:49,628 WARN L237 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_5dce6178-21b1-4990-b79a-bb3a12916449/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44124,44137] [2022-11-25 15:51:49,641 WARN L237 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_5dce6178-21b1-4990-b79a-bb3a12916449/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44245,44258] [2022-11-25 15:51:49,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:51:49,684 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:51:49,745 WARN L237 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_5dce6178-21b1-4990-b79a-bb3a12916449/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[33021,33034] [2022-11-25 15:51:49,802 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 15:51:49,811 WARN L237 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_5dce6178-21b1-4990-b79a-bb3a12916449/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44124,44137] [2022-11-25 15:51:49,812 WARN L237 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_5dce6178-21b1-4990-b79a-bb3a12916449/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i[44245,44258] [2022-11-25 15:51:49,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:51:49,862 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:51:49,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49 WrapperNode [2022-11-25 15:51:49,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:51:49,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:51:49,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:51:49,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:51:49,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (1/1) ... [2022-11-25 15:51:49,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (1/1) ... [2022-11-25 15:51:49,983 INFO L138 Inliner]: procedures = 176, calls = 328, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1147 [2022-11-25 15:51:49,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:51:49,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:51:49,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:51:49,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:51:49,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (1/1) ... [2022-11-25 15:51:49,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (1/1) ... [2022-11-25 15:51:50,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (1/1) ... [2022-11-25 15:51:50,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (1/1) ... [2022-11-25 15:51:50,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (1/1) ... [2022-11-25 15:51:50,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (1/1) ... [2022-11-25 15:51:50,083 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (1/1) ... [2022-11-25 15:51:50,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (1/1) ... [2022-11-25 15:51:50,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:51:50,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:51:50,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:51:50,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:51:50,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (1/1) ... [2022-11-25 15:51:50,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:51:50,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:51:50,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:51:50,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:51:50,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:51:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:51:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-25 15:51:50,182 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-25 15:51:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:51:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:51:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 15:51:50,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:51:50,183 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-25 15:51:50,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 15:51:50,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:51:50,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:51:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:51:50,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:51:50,562 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:51:50,564 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:51:52,218 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:51:52,226 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:51:52,226 INFO L300 CfgBuilder]: Removed 72 assume(true) statements. [2022-11-25 15:51:52,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:51:52 BoogieIcfgContainer [2022-11-25 15:51:52,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:51:52,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:51:52,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:51:52,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:51:52,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:51:48" (1/3) ... [2022-11-25 15:51:52,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7430e033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:51:52, skipping insertion in model container [2022-11-25 15:51:52,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:49" (2/3) ... [2022-11-25 15:51:52,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7430e033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:51:52, skipping insertion in model container [2022-11-25 15:51:52,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:51:52" (3/3) ... [2022-11-25 15:51:52,243 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test7-2.i [2022-11-25 15:51:52,265 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:51:52,265 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 15:51:52,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:51:52,347 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;@6a906225, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:51:52,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:51:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 206 states have (on average 1.6990291262135921) internal successors, (350), 208 states have internal predecessors, (350), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:51:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 15:51:52,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:51:52,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:51:52,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:51:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:52,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1993316328, now seen corresponding path program 1 times [2022-11-25 15:51:52,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:52,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071322885] [2022-11-25 15:51:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:52,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:52,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:51:52,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071322885] [2022-11-25 15:51:52,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071322885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:51:52,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:51:52,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:51:52,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236203532] [2022-11-25 15:51:52,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:51:52,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:51:52,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:51:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:51:52,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:51:52,659 INFO L87 Difference]: Start difference. First operand has 213 states, 206 states have (on average 1.6990291262135921) internal successors, (350), 208 states have internal predecessors, (350), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-25 15:51:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:51:52,756 INFO L93 Difference]: Finished difference Result 423 states and 709 transitions. [2022-11-25 15:51:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:51:52,759 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-11-25 15:51:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:51:52,774 INFO L225 Difference]: With dead ends: 423 [2022-11-25 15:51:52,774 INFO L226 Difference]: Without dead ends: 179 [2022-11-25 15:51:52,779 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 [2022-11-25 15:51:52,783 INFO L413 NwaCegarLoop]: 277 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, 277 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 [2022-11-25 15:51:52,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:51:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-25 15:51:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-11-25 15:51:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 173 states have (on average 1.3121387283236994) internal successors, (227), 174 states have internal predecessors, (227), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:51:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 233 transitions. [2022-11-25 15:51:52,843 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 233 transitions. Word has length 8 [2022-11-25 15:51:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:51:52,844 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 233 transitions. [2022-11-25 15:51:52,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-25 15:51:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 233 transitions. [2022-11-25 15:51:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 15:51:52,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:51:52,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:51:52,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:51:52,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:51:52,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:52,846 INFO L85 PathProgramCache]: Analyzing trace with hash -923396581, now seen corresponding path program 1 times [2022-11-25 15:51:52,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:52,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176947822] [2022-11-25 15:51:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:52,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:53,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:51:53,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176947822] [2022-11-25 15:51:53,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176947822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:51:53,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:51:53,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:51:53,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909597972] [2022-11-25 15:51:53,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:51:53,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:51:53,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:51:53,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:51:53,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:51:53,023 INFO L87 Difference]: Start difference. First operand 179 states and 233 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-25 15:51:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:51:53,518 INFO L93 Difference]: Finished difference Result 384 states and 502 transitions. [2022-11-25 15:51:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:51:53,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2022-11-25 15:51:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:51:53,521 INFO L225 Difference]: With dead ends: 384 [2022-11-25 15:51:53,521 INFO L226 Difference]: Without dead ends: 297 [2022-11-25 15:51:53,522 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 [2022-11-25 15:51:53,523 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 147 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:51:53,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 562 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 15:51:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-25 15:51:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 181. [2022-11-25 15:51:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.3085714285714285) internal successors, (229), 176 states have internal predecessors, (229), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:51:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 235 transitions. [2022-11-25 15:51:53,539 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 235 transitions. Word has length 10 [2022-11-25 15:51:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:51:53,540 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 235 transitions. [2022-11-25 15:51:53,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-25 15:51:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 235 transitions. [2022-11-25 15:51:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 15:51:53,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:51:53,542 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] [2022-11-25 15:51:53,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:51:53,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:51:53,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash -413647769, now seen corresponding path program 1 times [2022-11-25 15:51:53,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:53,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629228941] [2022-11-25 15:51:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:53,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:51:53,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510270154] [2022-11-25 15:51:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:53,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:53,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:51:53,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:51:53,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:51:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:54,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1571 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:51:54,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:51:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:54,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:51:54,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:51:54,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629228941] [2022-11-25 15:51:54,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:51:54,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510270154] [2022-11-25 15:51:54,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510270154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:51:54,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:51:54,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:51:54,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855560684] [2022-11-25 15:51:54,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:51:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:51:54,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:51:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:51:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:51:54,583 INFO L87 Difference]: Start difference. First operand 181 states and 235 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-25 15:51:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:51:54,663 INFO L93 Difference]: Finished difference Result 379 states and 497 transitions. [2022-11-25 15:51:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:51:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2022-11-25 15:51:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:51:54,668 INFO L225 Difference]: With dead ends: 379 [2022-11-25 15:51:54,668 INFO L226 Difference]: Without dead ends: 202 [2022-11-25 15:51:54,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:51:54,676 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 9 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 411 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 [2022-11-25 15:51:54,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 411 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:51:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-25 15:51:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-11-25 15:51:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 195 states have (on average 1.2769230769230768) internal successors, (249), 196 states have internal predecessors, (249), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:51:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 255 transitions. [2022-11-25 15:51:54,703 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 255 transitions. Word has length 62 [2022-11-25 15:51:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:51:54,703 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 255 transitions. [2022-11-25 15:51:54,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-25 15:51:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 255 transitions. [2022-11-25 15:51:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 15:51:54,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:51:54,705 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] [2022-11-25 15:51:54,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:51:54,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:54,906 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:51:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash 483745509, now seen corresponding path program 1 times [2022-11-25 15:51:54,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:54,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421583224] [2022-11-25 15:51:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:54,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:55,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:51:55,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934343572] [2022-11-25 15:51:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:55,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:55,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:51:55,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:51:55,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:51:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:55,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:51:55,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:51:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:55,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:51:55,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:51:55,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421583224] [2022-11-25 15:51:55,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:51:55,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934343572] [2022-11-25 15:51:55,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934343572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:51:55,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:51:55,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:51:55,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990234871] [2022-11-25 15:51:55,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:51:55,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:51:55,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:51:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:51:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:51:55,887 INFO L87 Difference]: Start difference. First operand 201 states and 255 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2022-11-25 15:51:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:51:56,005 INFO L93 Difference]: Finished difference Result 390 states and 498 transitions. [2022-11-25 15:51:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:51:56,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 62 [2022-11-25 15:51:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:51:56,007 INFO L225 Difference]: With dead ends: 390 [2022-11-25 15:51:56,007 INFO L226 Difference]: Without dead ends: 193 [2022-11-25 15:51:56,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:51:56,008 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 218 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 429 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 [2022-11-25 15:51:56,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 429 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:51:56,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-25 15:51:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2022-11-25 15:51:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 181 states have (on average 1.2596685082872927) internal successors, (228), 182 states have internal predecessors, (228), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:51:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 234 transitions. [2022-11-25 15:51:56,017 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 234 transitions. Word has length 62 [2022-11-25 15:51:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:51:56,018 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 234 transitions. [2022-11-25 15:51:56,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2022-11-25 15:51:56,018 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 234 transitions. [2022-11-25 15:51:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 15:51:56,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:51:56,020 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] [2022-11-25 15:51:56,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:51:56,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:56,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:51:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:56,230 INFO L85 PathProgramCache]: Analyzing trace with hash 955892211, now seen corresponding path program 1 times [2022-11-25 15:51:56,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:56,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134317380] [2022-11-25 15:51:56,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:56,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:56,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:51:56,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091808109] [2022-11-25 15:51:56,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:56,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:56,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:51:56,408 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:51:56,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:51:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:57,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 15:51:57,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:51:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:57,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:51:57,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:51:57,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134317380] [2022-11-25 15:51:57,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:51:57,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091808109] [2022-11-25 15:51:57,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091808109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:51:57,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:51:57,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:51:57,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434386816] [2022-11-25 15:51:57,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:51:57,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:51:57,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:51:57,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:51:57,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:51:57,458 INFO L87 Difference]: Start difference. First operand 187 states and 234 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-25 15:51:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:51:57,635 INFO L93 Difference]: Finished difference Result 483 states and 604 transitions. [2022-11-25 15:51:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:51:57,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2022-11-25 15:51:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:51:57,637 INFO L225 Difference]: With dead ends: 483 [2022-11-25 15:51:57,638 INFO L226 Difference]: Without dead ends: 300 [2022-11-25 15:51:57,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:51:57,639 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 101 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:51:57,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 463 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:51:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-25 15:51:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 293. [2022-11-25 15:51:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 287 states have (on average 1.2578397212543555) internal successors, (361), 288 states have internal predecessors, (361), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:51:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 367 transitions. [2022-11-25 15:51:57,653 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 367 transitions. Word has length 62 [2022-11-25 15:51:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:51:57,653 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 367 transitions. [2022-11-25 15:51:57,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-25 15:51:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 367 transitions. [2022-11-25 15:51:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-25 15:51:57,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:51:57,656 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] [2022-11-25 15:51:57,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 15:51:57,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:57,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:51:57,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1759753953, now seen corresponding path program 1 times [2022-11-25 15:51:57,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:57,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248386596] [2022-11-25 15:51:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:57,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:57,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:51:57,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277592981] [2022-11-25 15:51:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:57,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:57,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:51:57,985 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:51:57,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:51:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:58,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 15:51:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:51:58,692 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 [2022-11-25 15:51:58,710 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 [2022-11-25 15:51:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:51:58,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:51:58,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:51:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248386596] [2022-11-25 15:51:58,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:51:58,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277592981] [2022-11-25 15:51:58,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277592981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:51:58,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:51:58,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:51:58,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550229223] [2022-11-25 15:51:58,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:51:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:51:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:51:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:51:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:51:58,722 INFO L87 Difference]: Start difference. First operand 293 states and 367 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2022-11-25 15:51:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:51:59,081 INFO L93 Difference]: Finished difference Result 391 states and 497 transitions. [2022-11-25 15:51:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:51:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 77 [2022-11-25 15:51:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:51:59,084 INFO L225 Difference]: With dead ends: 391 [2022-11-25 15:51:59,084 INFO L226 Difference]: Without dead ends: 387 [2022-11-25 15:51:59,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:51:59,085 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 103 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:51:59,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 586 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:51:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-25 15:51:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 295. [2022-11-25 15:51:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.2560553633217992) internal successors, (363), 290 states have internal predecessors, (363), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:51:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 369 transitions. [2022-11-25 15:51:59,100 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 369 transitions. Word has length 77 [2022-11-25 15:51:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:51:59,102 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 369 transitions. [2022-11-25 15:51:59,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2022-11-25 15:51:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 369 transitions. [2022-11-25 15:51:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-25 15:51:59,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:51:59,106 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] [2022-11-25 15:51:59,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:51:59,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:59,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:51:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash -84113561, now seen corresponding path program 1 times [2022-11-25 15:51:59,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:59,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47945269] [2022-11-25 15:51:59,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:59,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:59,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:51:59,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662311503] [2022-11-25 15:51:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:59,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:59,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:51:59,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:51:59,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:52:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:00,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:52:00,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:52:00,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:52:00,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:52:00,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47945269] [2022-11-25 15:52:00,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:52:00,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662311503] [2022-11-25 15:52:00,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662311503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:52:00,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:52:00,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:52:00,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684925313] [2022-11-25 15:52:00,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:52:00,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:52:00,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:52:00,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:52:00,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:52:00,166 INFO L87 Difference]: Start difference. First operand 295 states and 369 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) [2022-11-25 15:52:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:00,250 INFO L93 Difference]: Finished difference Result 485 states and 628 transitions. [2022-11-25 15:52:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:52:00,251 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 [2022-11-25 15:52:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:00,255 INFO L225 Difference]: With dead ends: 485 [2022-11-25 15:52:00,256 INFO L226 Difference]: Without dead ends: 337 [2022-11-25 15:52:00,256 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 [2022-11-25 15:52:00,259 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 10 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 397 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 [2022-11-25 15:52:00,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 397 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:52:00,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-25 15:52:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2022-11-25 15:52:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 329 states have (on average 1.2249240121580547) internal successors, (403), 330 states have internal predecessors, (403), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:52:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 409 transitions. [2022-11-25 15:52:00,274 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 409 transitions. Word has length 111 [2022-11-25 15:52:00,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:00,275 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 409 transitions. [2022-11-25 15:52:00,275 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) [2022-11-25 15:52:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 409 transitions. [2022-11-25 15:52:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-25 15:52:00,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:00,278 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] [2022-11-25 15:52:00,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:00,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 15:52:00,487 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:00,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash -364911253, now seen corresponding path program 1 times [2022-11-25 15:52:00,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:52:00,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003991202] [2022-11-25 15:52:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:00,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:52:00,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:52:00,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731252680] [2022-11-25 15:52:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:00,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:00,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:52:00,554 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:52:00,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:52:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:52:01,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:52:01,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:52:01,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:52:01,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003991202] [2022-11-25 15:52:01,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:52:01,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731252680] [2022-11-25 15:52:01,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731252680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:52:01,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:52:01,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:52:01,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805405258] [2022-11-25 15:52:01,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:52:01,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:52:01,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:52:01,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:52:01,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:52:01,284 INFO L87 Difference]: Start difference. First operand 335 states and 409 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) [2022-11-25 15:52:01,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:01,362 INFO L93 Difference]: Finished difference Result 500 states and 623 transitions. [2022-11-25 15:52:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:52:01,363 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 [2022-11-25 15:52:01,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:01,365 INFO L225 Difference]: With dead ends: 500 [2022-11-25 15:52:01,365 INFO L226 Difference]: Without dead ends: 312 [2022-11-25 15:52:01,366 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 [2022-11-25 15:52:01,367 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 110 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 513 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 [2022-11-25 15:52:01,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 513 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:52:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-25 15:52:01,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 307. [2022-11-25 15:52:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 302 states have internal predecessors, (361), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:52:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 367 transitions. [2022-11-25 15:52:01,379 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 367 transitions. Word has length 111 [2022-11-25 15:52:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:01,380 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 367 transitions. [2022-11-25 15:52:01,380 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) [2022-11-25 15:52:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 367 transitions. [2022-11-25 15:52:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-25 15:52:01,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:01,382 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] [2022-11-25 15:52:01,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:01,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 15:52:01,600 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:01,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:01,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1247760099, now seen corresponding path program 1 times [2022-11-25 15:52:01,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:52:01,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018410141] [2022-11-25 15:52:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:01,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:52:01,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:52:01,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329815520] [2022-11-25 15:52:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:01,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:01,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:52:01,674 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:52:01,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:52:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:02,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 15:52:02,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:52:02,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:52:02,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:52:02,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018410141] [2022-11-25 15:52:02,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:52:02,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329815520] [2022-11-25 15:52:02,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329815520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:52:02,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:52:02,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:52:02,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577676514] [2022-11-25 15:52:02,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:52:02,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:52:02,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:52:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:52:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:52:02,659 INFO L87 Difference]: Start difference. First operand 307 states and 367 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) [2022-11-25 15:52:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:02,965 INFO L93 Difference]: Finished difference Result 657 states and 792 transitions. [2022-11-25 15:52:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:52:02,965 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 [2022-11-25 15:52:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:02,967 INFO L225 Difference]: With dead ends: 657 [2022-11-25 15:52:02,967 INFO L226 Difference]: Without dead ends: 398 [2022-11-25 15:52:02,968 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 [2022-11-25 15:52:02,969 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 406 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:52:02,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 373 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:52:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-25 15:52:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 391. [2022-11-25 15:52:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 385 states have (on average 1.2077922077922079) internal successors, (465), 386 states have internal predecessors, (465), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:52:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 471 transitions. [2022-11-25 15:52:02,986 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 471 transitions. Word has length 111 [2022-11-25 15:52:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:02,986 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 471 transitions. [2022-11-25 15:52:02,987 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) [2022-11-25 15:52:02,987 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 471 transitions. [2022-11-25 15:52:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-25 15:52:02,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:02,988 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] [2022-11-25 15:52:03,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:03,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:03,203 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash 85368492, now seen corresponding path program 1 times [2022-11-25 15:52:03,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:52:03,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244707587] [2022-11-25 15:52:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:52:03,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:52:03,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320734195] [2022-11-25 15:52:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:03,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:03,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:52:03,259 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:52:03,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:52:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:30,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:52:30,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:52:30,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:52:30,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:52:30,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244707587] [2022-11-25 15:52:30,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:52:30,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320734195] [2022-11-25 15:52:30,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320734195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:52:30,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:52:30,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:52:30,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23174192] [2022-11-25 15:52:30,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:52:30,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:52:30,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:52:30,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:52:30,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:52:30,833 INFO L87 Difference]: Start difference. First operand 391 states and 471 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:52:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:30,874 INFO L93 Difference]: Finished difference Result 734 states and 891 transitions. [2022-11-25 15:52:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:52:30,875 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2022-11-25 15:52:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:30,879 INFO L225 Difference]: With dead ends: 734 [2022-11-25 15:52:30,879 INFO L226 Difference]: Without dead ends: 394 [2022-11-25 15:52:30,880 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 [2022-11-25 15:52:30,880 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 2 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 644 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 [2022-11-25 15:52:30,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 644 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:52:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-25 15:52:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2022-11-25 15:52:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 387 states have (on average 1.2093023255813953) internal successors, (468), 389 states have internal predecessors, (468), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 15:52:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 475 transitions. [2022-11-25 15:52:30,900 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 475 transitions. Word has length 118 [2022-11-25 15:52:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:30,900 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 475 transitions. [2022-11-25 15:52:30,901 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:52:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 475 transitions. [2022-11-25 15:52:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-25 15:52:30,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:30,903 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] [2022-11-25 15:52:30,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:31,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:31,122 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:31,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:31,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1969553870, now seen corresponding path program 1 times [2022-11-25 15:52:31,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:52:31,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515991864] [2022-11-25 15:52:31,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:31,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:52:31,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:52:31,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063497026] [2022-11-25 15:52:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:31,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:52:31,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:52:31,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:52:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:53,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:52:53,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:52:53,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:52:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:52:54,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:52:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515991864] [2022-11-25 15:52:54,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:52:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063497026] [2022-11-25 15:52:54,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063497026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:52:54,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:52:54,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 15:52:54,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480524576] [2022-11-25 15:52:54,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:52:54,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:52:54,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:52:54,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:52:54,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:52:54,128 INFO L87 Difference]: Start difference. First operand 394 states and 475 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 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) [2022-11-25 15:52:54,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:54,319 INFO L93 Difference]: Finished difference Result 748 states and 912 transitions. [2022-11-25 15:52:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:52:54,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 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 120 [2022-11-25 15:52:54,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:54,322 INFO L225 Difference]: With dead ends: 748 [2022-11-25 15:52:54,322 INFO L226 Difference]: Without dead ends: 403 [2022-11-25 15:52:54,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:52:54,324 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 9 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:52:54,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1271 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:52:54,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-25 15:52:54,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2022-11-25 15:52:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 395 states have (on average 1.2151898734177216) internal successors, (480), 397 states have internal predecessors, (480), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 15:52:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 487 transitions. [2022-11-25 15:52:54,343 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 487 transitions. Word has length 120 [2022-11-25 15:52:54,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:54,343 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 487 transitions. [2022-11-25 15:52:54,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 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) [2022-11-25 15:52:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 487 transitions. [2022-11-25 15:52:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-25 15:52:54,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:54,384 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] [2022-11-25 15:52:54,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:54,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:54,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:54,608 INFO L85 PathProgramCache]: Analyzing trace with hash 106215020, now seen corresponding path program 2 times [2022-11-25 15:52:54,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:52:54,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45582436] [2022-11-25 15:52:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:54,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:52:54,668 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:52:54,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822383203] [2022-11-25 15:52:54,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:52:54,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:54,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:52:54,670 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:52:54,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:52:57,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:52:57,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:52:57,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 15:52:57,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:52:57,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:52:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:52:57,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:52:57,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45582436] [2022-11-25 15:52:57,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:52:57,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822383203] [2022-11-25 15:52:57,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822383203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:52:57,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:52:57,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2022-11-25 15:52:57,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7323635] [2022-11-25 15:52:57,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:52:57,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:52:57,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:52:57,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:52:57,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:52:57,406 INFO L87 Difference]: Start difference. First operand 403 states and 487 transitions. Second operand has 15 states, 15 states have (on average 8.6) internal successors, (129), 15 states have internal predecessors, (129), 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) [2022-11-25 15:52:57,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:57,828 INFO L93 Difference]: Finished difference Result 761 states and 930 transitions. [2022-11-25 15:52:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 15:52:57,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.6) internal successors, (129), 15 states have internal predecessors, (129), 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 124 [2022-11-25 15:52:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:57,831 INFO L225 Difference]: With dead ends: 761 [2022-11-25 15:52:57,831 INFO L226 Difference]: Without dead ends: 418 [2022-11-25 15:52:57,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2022-11-25 15:52:57,833 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 22 mSDsluCounter, 2319 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2535 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:52:57,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2535 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:52:57,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-25 15:52:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 409. [2022-11-25 15:52:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 401 states have (on average 1.2219451371571073) internal successors, (490), 403 states have internal predecessors, (490), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 15:52:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 497 transitions. [2022-11-25 15:52:57,856 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 497 transitions. Word has length 124 [2022-11-25 15:52:57,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:57,857 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 497 transitions. [2022-11-25 15:52:57,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.6) internal successors, (129), 15 states have internal predecessors, (129), 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) [2022-11-25 15:52:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 497 transitions. [2022-11-25 15:52:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 15:52:57,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:57,859 INFO L195 NwaCegarLoop]: trace histogram [12, 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] [2022-11-25 15:52:57,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:58,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:58,077 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:58,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1131088212, now seen corresponding path program 3 times [2022-11-25 15:52:58,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:52:58,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399812613] [2022-11-25 15:52:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:58,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:52:58,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:52:58,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585146416] [2022-11-25 15:52:58,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:52:58,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:58,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:52:58,175 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:52:58,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dce6178-21b1-4990-b79a-bb3a12916449/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process