./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c --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_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/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_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/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_8b4c8eef-eea4-42af-9207-f4c8ee399af8/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 a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --- 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 17:57:59,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:57:59,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:57:59,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:57:59,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:57:59,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:57:59,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:57:59,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:57:59,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:57:59,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:57:59,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:57:59,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:57:59,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:57:59,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:57:59,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:57:59,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:57:59,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:57:59,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:57:59,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:57:59,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:57:59,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:57:59,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:57:59,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:57:59,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:57:59,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:57:59,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:57:59,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:57:59,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:57:59,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:57:59,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:57:59,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:57:59,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:57:59,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:57:59,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:57:59,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:57:59,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:57:59,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:57:59,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:57:59,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:57:59,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:57:59,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:57:59,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:57:59,861 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:57:59,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:57:59,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:57:59,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:57:59,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:57:59,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:57:59,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:57:59,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:57:59,864 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:57:59,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:57:59,865 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:57:59,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:57:59,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:57:59,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:57:59,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:57:59,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:57:59,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:57:59,867 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:57:59,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:57:59,867 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:57:59,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:57:59,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:57:59,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:57:59,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:57:59,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:57:59,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:57:59,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:57:59,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:57:59,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:57:59,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:57:59,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:57:59,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:57:59,871 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:57:59,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:57:59,871 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_8b4c8eef-eea4-42af-9207-f4c8ee399af8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d [2022-11-25 17:58:00,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:58:00,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:58:00,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:58:00,195 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:58:00,195 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:58:00,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2022-11-25 17:58:03,307 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:58:03,576 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:58:03,578 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2022-11-25 17:58:03,610 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/data/d462c821e/0807f71e72404ff880ee46e74db3c5c6/FLAGe4ff54615 [2022-11-25 17:58:03,631 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/data/d462c821e/0807f71e72404ff880ee46e74db3c5c6 [2022-11-25 17:58:03,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:58:03,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:58:03,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:58:03,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:58:03,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:58:03,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:03,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cee2474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03, skipping insertion in model container [2022-11-25 17:58:03,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:03,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:58:03,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:58:03,919 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_8b4c8eef-eea4-42af-9207-f4c8ee399af8/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2022-11-25 17:58:03,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:58:03,957 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:58:03,973 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_8b4c8eef-eea4-42af-9207-f4c8ee399af8/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2022-11-25 17:58:03,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:58:03,993 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:58:03,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03 WrapperNode [2022-11-25 17:58:03,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:58:03,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:58:03,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:58:03,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:58:04,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:04,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:04,040 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-11-25 17:58:04,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:58:04,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:58:04,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:58:04,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:58:04,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:04,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:04,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:04,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:04,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:04,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:04,078 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:04,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:04,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:58:04,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:58:04,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:58:04,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:58:04,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (1/1) ... [2022-11-25 17:58:04,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:58:04,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:04,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:58:04,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:58:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:58:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:58:04,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:58:04,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:58:04,258 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:58:04,264 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:58:04,474 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:58:04,481 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:58:04,482 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 17:58:04,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:58:04 BoogieIcfgContainer [2022-11-25 17:58:04,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:58:04,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:58:04,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:58:04,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:58:04,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:58:03" (1/3) ... [2022-11-25 17:58:04,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d17d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:58:04, skipping insertion in model container [2022-11-25 17:58:04,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:03" (2/3) ... [2022-11-25 17:58:04,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d17d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:58:04, skipping insertion in model container [2022-11-25 17:58:04,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:58:04" (3/3) ... [2022-11-25 17:58:04,497 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2022-11-25 17:58:04,527 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:58:04,527 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:58:04,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:58:04,624 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;@36d92663, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:58:04,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:58:04,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 17:58:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 17:58:04,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:04,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:58:04,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:04,659 INFO L85 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2022-11-25 17:58:04,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:04,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682422927] [2022-11-25 17:58:04,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:04,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:04,885 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 17:58:04,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:04,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682422927] [2022-11-25 17:58:04,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682422927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:58:04,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:58:04,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:58:04,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709169625] [2022-11-25 17:58:04,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:58:04,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:58:04,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:04,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:58:04,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:58:04,939 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:58:04,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:04,981 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2022-11-25 17:58:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:58:04,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-25 17:58:04,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:04,994 INFO L225 Difference]: With dead ends: 28 [2022-11-25 17:58:04,994 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 17:58:04,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 17:58:05,002 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:05,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:58:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 17:58:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-25 17:58:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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 17:58:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-25 17:58:05,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-11-25 17:58:05,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:05,091 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-25 17:58:05,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:58:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-25 17:58:05,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 17:58:05,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:05,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:05,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:58:05,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:05,106 INFO L85 PathProgramCache]: Analyzing trace with hash 295698875, now seen corresponding path program 1 times [2022-11-25 17:58:05,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:05,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643182688] [2022-11-25 17:58:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:05,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:05,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643182688] [2022-11-25 17:58:05,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643182688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:05,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630885206] [2022-11-25 17:58:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:05,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:05,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:05,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:05,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:58:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:05,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:58:05,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:05,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:05,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630885206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:05,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:05,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 17:58:05,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635499851] [2022-11-25 17:58:05,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:05,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:58:05,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:05,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:58:05,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:58:05,501 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 17:58:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:05,563 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2022-11-25 17:58:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:58:05,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 17:58:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:05,566 INFO L225 Difference]: With dead ends: 26 [2022-11-25 17:58:05,567 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 17:58:05,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:58:05,569 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:05,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 27 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:58:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 17:58:05,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-11-25 17:58:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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 17:58:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-25 17:58:05,586 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-25 17:58:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:05,588 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-25 17:58:05,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 17:58:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-25 17:58:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 17:58:05,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:05,589 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:05,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:05,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:05,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:05,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:05,795 INFO L85 PathProgramCache]: Analyzing trace with hash 890916581, now seen corresponding path program 1 times [2022-11-25 17:58:05,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:05,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077361372] [2022-11-25 17:58:05,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:05,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:58:05,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:05,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077361372] [2022-11-25 17:58:05,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077361372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:58:05,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:58:05,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:58:05,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142615603] [2022-11-25 17:58:05,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:58:05,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:58:05,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:05,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:58:05,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:58:05,939 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 17:58:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:05,962 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-11-25 17:58:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:58:05,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 14 [2022-11-25 17:58:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:05,964 INFO L225 Difference]: With dead ends: 29 [2022-11-25 17:58:05,964 INFO L226 Difference]: Without dead ends: 19 [2022-11-25 17:58:05,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 17:58:05,966 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:05,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:58:05,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-25 17:58:05,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-25 17:58:05,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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 17:58:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-25 17:58:05,973 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2022-11-25 17:58:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:05,974 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-25 17:58:05,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 17:58:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-25 17:58:05,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 17:58:05,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:05,975 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:05,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:58:05,976 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:05,977 INFO L85 PathProgramCache]: Analyzing trace with hash -894818322, now seen corresponding path program 1 times [2022-11-25 17:58:05,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:05,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739153455] [2022-11-25 17:58:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:05,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:58:06,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:06,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739153455] [2022-11-25 17:58:06,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739153455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:06,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094252149] [2022-11-25 17:58:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:06,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:06,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:06,064 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:06,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:58:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:06,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:58:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:58:06,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:58:06,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094252149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:06,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:06,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 17:58:06,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640173403] [2022-11-25 17:58:06,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:06,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:58:06,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:06,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:58:06,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:58:06,196 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 17:58:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:06,254 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-11-25 17:58:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:58:06,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 18 [2022-11-25 17:58:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:06,256 INFO L225 Difference]: With dead ends: 40 [2022-11-25 17:58:06,256 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 17:58:06,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:58:06,257 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:06,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:58:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 17:58:06,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-25 17:58:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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 17:58:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-25 17:58:06,270 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-11-25 17:58:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:06,271 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-25 17:58:06,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 17:58:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-25 17:58:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 17:58:06,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:06,272 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:06,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:06,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:06,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:06,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:06,479 INFO L85 PathProgramCache]: Analyzing trace with hash 118887930, now seen corresponding path program 2 times [2022-11-25 17:58:06,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:06,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905272109] [2022-11-25 17:58:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:06,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:58:06,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:06,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905272109] [2022-11-25 17:58:06,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905272109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:06,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305268215] [2022-11-25 17:58:06,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:58:06,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:06,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:06,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:06,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:58:06,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:58:06,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:06,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:58:06,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:58:06,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:58:06,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305268215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:06,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:06,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-25 17:58:06,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482164769] [2022-11-25 17:58:06,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:06,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:58:06,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:58:06,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:58:06,960 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 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 17:58:07,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:07,031 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-11-25 17:58:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:58:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 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 26 [2022-11-25 17:58:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:07,048 INFO L225 Difference]: With dead ends: 56 [2022-11-25 17:58:07,048 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 17:58:07,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:58:07,050 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:07,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:58:07,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 17:58:07,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-25 17:58:07,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 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 17:58:07,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-11-25 17:58:07,072 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2022-11-25 17:58:07,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:07,072 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-11-25 17:58:07,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 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 17:58:07,073 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-11-25 17:58:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 17:58:07,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:07,074 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:07,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 17:58:07,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:07,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash -173044206, now seen corresponding path program 3 times [2022-11-25 17:58:07,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:07,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604200810] [2022-11-25 17:58:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:58:07,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:07,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604200810] [2022-11-25 17:58:07,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604200810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:07,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097831777] [2022-11-25 17:58:07,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:58:07,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:07,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:07,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:07,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:58:07,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:58:07,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:07,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:58:07,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-25 17:58:07,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-25 17:58:07,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097831777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:07,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:07,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 4] total 21 [2022-11-25 17:58:07,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181709588] [2022-11-25 17:58:07,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:07,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:58:07,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:07,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:58:07,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:58:07,786 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 17:58:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:07,874 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2022-11-25 17:58:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:58:07,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 42 [2022-11-25 17:58:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:07,876 INFO L225 Difference]: With dead ends: 70 [2022-11-25 17:58:07,876 INFO L226 Difference]: Without dead ends: 57 [2022-11-25 17:58:07,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:58:07,877 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:07,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:58:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-25 17:58:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-25 17:58:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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 17:58:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-11-25 17:58:07,886 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 42 [2022-11-25 17:58:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:07,887 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-11-25 17:58:07,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 17:58:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-11-25 17:58:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 17:58:07,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:07,889 INFO L195 NwaCegarLoop]: trace histogram [20, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:07,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:08,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:08,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:08,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1187818742, now seen corresponding path program 4 times [2022-11-25 17:58:08,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:08,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529651149] [2022-11-25 17:58:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:08,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 17:58:08,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:08,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529651149] [2022-11-25 17:58:08,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529651149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:08,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80078232] [2022-11-25 17:58:08,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:58:08,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:08,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:08,551 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:08,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:58:08,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:58:08,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:58:08,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 17:58:08,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 17:58:09,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80078232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:09,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:09,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-11-25 17:58:09,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818495865] [2022-11-25 17:58:09,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:09,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:58:09,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:09,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:58:09,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:58:09,286 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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 17:58:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:09,415 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2022-11-25 17:58:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:58:09,415 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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 56 [2022-11-25 17:58:09,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:09,419 INFO L225 Difference]: With dead ends: 116 [2022-11-25 17:58:09,419 INFO L226 Difference]: Without dead ends: 91 [2022-11-25 17:58:09,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:58:09,422 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:09,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:58:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-25 17:58:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-25 17:58:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 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 17:58:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-11-25 17:58:09,456 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 56 [2022-11-25 17:58:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:09,457 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-11-25 17:58:09,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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 17:58:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-11-25 17:58:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-25 17:58:09,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:09,463 INFO L195 NwaCegarLoop]: trace histogram [37, 32, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:09,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 17:58:09,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:09,668 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:09,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:09,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1855342691, now seen corresponding path program 5 times [2022-11-25 17:58:09,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:09,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707691218] [2022-11-25 17:58:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:09,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 297 proven. 1056 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 17:58:10,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:10,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707691218] [2022-11-25 17:58:10,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707691218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:10,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531374430] [2022-11-25 17:58:10,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:58:10,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:10,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:10,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:10,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:58:10,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-11-25 17:58:10,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:58:10,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-11-25 17:58:11,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-11-25 17:58:12,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531374430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:12,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:12,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17, 17] total 65 [2022-11-25 17:58:12,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218671273] [2022-11-25 17:58:12,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:12,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-25 17:58:12,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:12,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-25 17:58:12,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-11-25 17:58:12,320 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 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 17:58:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:12,758 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2022-11-25 17:58:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-25 17:58:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 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 90 [2022-11-25 17:58:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:12,761 INFO L225 Difference]: With dead ends: 234 [2022-11-25 17:58:12,762 INFO L226 Difference]: Without dead ends: 209 [2022-11-25 17:58:12,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-11-25 17:58:12,765 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 129 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:12,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 63 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:58:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-25 17:58:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-11-25 17:58:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.1875) internal successors, (247), 208 states have internal predecessors, (247), 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 17:58:12,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 247 transitions. [2022-11-25 17:58:12,801 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 247 transitions. Word has length 90 [2022-11-25 17:58:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:12,803 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 247 transitions. [2022-11-25 17:58:12,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 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 17:58:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 247 transitions. [2022-11-25 17:58:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-25 17:58:12,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:12,819 INFO L195 NwaCegarLoop]: trace histogram [67, 34, 34, 33, 30, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:12,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:13,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:13,034 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash 960421829, now seen corresponding path program 6 times [2022-11-25 17:58:13,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:13,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689690484] [2022-11-25 17:58:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:13,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2022-11-25 17:58:14,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:14,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689690484] [2022-11-25 17:58:14,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689690484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:14,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086139099] [2022-11-25 17:58:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:58:14,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:14,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:14,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:14,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:58:14,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-11-25 17:58:14,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:14,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:58:14,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-11-25 17:58:14,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-11-25 17:58:15,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086139099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:15,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:15,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 46 [2022-11-25 17:58:15,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997537919] [2022-11-25 17:58:15,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:15,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 17:58:15,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:15,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 17:58:15,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 17:58:15,023 INFO L87 Difference]: Start difference. First operand 209 states and 247 transitions. Second operand has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 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 17:58:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:15,177 INFO L93 Difference]: Finished difference Result 376 states and 471 transitions. [2022-11-25 17:58:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 17:58:15,177 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 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 208 [2022-11-25 17:58:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:15,179 INFO L225 Difference]: With dead ends: 376 [2022-11-25 17:58:15,179 INFO L226 Difference]: Without dead ends: 235 [2022-11-25 17:58:15,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 17:58:15,181 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:15,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:58:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-25 17:58:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-11-25 17:58:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.2179487179487178) internal successors, (285), 234 states have internal predecessors, (285), 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 17:58:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 285 transitions. [2022-11-25 17:58:15,193 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 285 transitions. Word has length 208 [2022-11-25 17:58:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:15,193 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 285 transitions. [2022-11-25 17:58:15,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 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 17:58:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 285 transitions. [2022-11-25 17:58:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-25 17:58:15,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:15,196 INFO L195 NwaCegarLoop]: trace histogram [74, 40, 40, 34, 30, 10, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:15,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:15,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:15,407 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:15,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:15,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1401661778, now seen corresponding path program 7 times [2022-11-25 17:58:15,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:15,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236426967] [2022-11-25 17:58:15,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:15,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-11-25 17:58:16,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236426967] [2022-11-25 17:58:16,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236426967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469956550] [2022-11-25 17:58:16,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:58:16,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:16,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:16,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:16,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:58:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:16,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 17:58:16,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-11-25 17:58:17,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-11-25 17:58:18,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469956550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:18,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:18,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2022-11-25 17:58:18,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279672585] [2022-11-25 17:58:18,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:18,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-25 17:58:18,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:18,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-25 17:58:18,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2022-11-25 17:58:18,912 INFO L87 Difference]: Start difference. First operand 235 states and 285 transitions. Second operand has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 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 17:58:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:19,133 INFO L93 Difference]: Finished difference Result 472 states and 608 transitions. [2022-11-25 17:58:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-25 17:58:19,133 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 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 234 [2022-11-25 17:58:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:19,135 INFO L225 Difference]: With dead ends: 472 [2022-11-25 17:58:19,135 INFO L226 Difference]: Without dead ends: 307 [2022-11-25 17:58:19,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2022-11-25 17:58:19,138 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:19,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:58:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-25 17:58:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-11-25 17:58:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.1666666666666667) internal successors, (357), 306 states have internal predecessors, (357), 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 17:58:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2022-11-25 17:58:19,156 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 234 [2022-11-25 17:58:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:19,157 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2022-11-25 17:58:19,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 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 17:58:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2022-11-25 17:58:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-11-25 17:58:19,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:19,163 INFO L195 NwaCegarLoop]: trace histogram [110, 70, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:19,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:19,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:58:19,369 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:19,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1256502206, now seen corresponding path program 8 times [2022-11-25 17:58:19,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:19,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742787205] [2022-11-25 17:58:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:19,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-11-25 17:58:23,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:23,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742787205] [2022-11-25 17:58:23,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742787205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:23,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637910320] [2022-11-25 17:58:23,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:58:23,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:23,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:23,713 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:23,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:58:23,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:58:23,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:23,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-25 17:58:23,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-11-25 17:58:24,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-11-25 17:58:30,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637910320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:30,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:30,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 145 [2022-11-25 17:58:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721332084] [2022-11-25 17:58:30,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:30,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-25 17:58:30,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:30,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-25 17:58:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2022-11-25 17:58:30,543 INFO L87 Difference]: Start difference. First operand 307 states and 357 transitions. Second operand has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 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 17:58:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:31,202 INFO L93 Difference]: Finished difference Result 616 states and 788 transitions. [2022-11-25 17:58:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-11-25 17:58:31,203 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 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 306 [2022-11-25 17:58:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:31,208 INFO L225 Difference]: With dead ends: 616 [2022-11-25 17:58:31,208 INFO L226 Difference]: Without dead ends: 451 [2022-11-25 17:58:31,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2022-11-25 17:58:31,214 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:31,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:58:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-25 17:58:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2022-11-25 17:58:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.1133333333333333) internal successors, (501), 450 states have internal predecessors, (501), 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 17:58:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 501 transitions. [2022-11-25 17:58:31,252 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 501 transitions. Word has length 306 [2022-11-25 17:58:31,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:31,253 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 501 transitions. [2022-11-25 17:58:31,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 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 17:58:31,253 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 501 transitions. [2022-11-25 17:58:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2022-11-25 17:58:31,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:31,263 INFO L195 NwaCegarLoop]: trace histogram [182, 142, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:31,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:31,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:58:31,469 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:31,470 INFO L85 PathProgramCache]: Analyzing trace with hash -932895594, now seen corresponding path program 9 times [2022-11-25 17:58:31,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:31,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543090475] [2022-11-25 17:58:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:31,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 11297 proven. 20306 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-11-25 17:58:44,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543090475] [2022-11-25 17:58:44,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543090475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740900111] [2022-11-25 17:58:44,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:58:44,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:44,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:44,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:44,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:58:44,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-11-25 17:58:44,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:44,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:58:44,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-11-25 17:58:46,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-11-25 17:58:47,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740900111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:47,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:47,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 13, 13] total 167 [2022-11-25 17:58:47,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167169278] [2022-11-25 17:58:47,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:47,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-11-25 17:58:47,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-11-25 17:58:47,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2022-11-25 17:58:47,907 INFO L87 Difference]: Start difference. First operand 451 states and 501 transitions. Second operand has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 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 17:58:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:49,200 INFO L93 Difference]: Finished difference Result 666 states and 803 transitions. [2022-11-25 17:58:49,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-11-25 17:58:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 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 450 [2022-11-25 17:58:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:49,203 INFO L225 Difference]: With dead ends: 666 [2022-11-25 17:58:49,203 INFO L226 Difference]: Without dead ends: 501 [2022-11-25 17:58:49,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 878 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2022-11-25 17:58:49,207 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:49,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 39 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:58:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-25 17:58:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-11-25 17:58:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.15) internal successors, (575), 500 states have internal predecessors, (575), 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 17:58:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 575 transitions. [2022-11-25 17:58:49,230 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 575 transitions. Word has length 450 [2022-11-25 17:58:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:49,230 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 575 transitions. [2022-11-25 17:58:49,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 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 17:58:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 575 transitions. [2022-11-25 17:58:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2022-11-25 17:58:49,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:49,243 INFO L195 NwaCegarLoop]: trace histogram [195, 143, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:49,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:49,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:58:49,448 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash -278359667, now seen corresponding path program 10 times [2022-11-25 17:58:49,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:49,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296849703] [2022-11-25 17:58:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:49,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-11-25 17:59:02,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:59:02,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296849703] [2022-11-25 17:59:02,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296849703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:59:02,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380857869] [2022-11-25 17:59:02,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:59:02,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:59:02,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:59:02,551 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:59:02,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:59:02,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:59:02,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:59:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 145 conjunts are in the unsatisfiable core [2022-11-25 17:59:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-11-25 17:59:03,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:59:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-11-25 17:59:28,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380857869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:59:28,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:59:28,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146, 146] total 291 [2022-11-25 17:59:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015519602] [2022-11-25 17:59:28,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:59:28,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 291 states [2022-11-25 17:59:28,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:59:28,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 291 interpolants. [2022-11-25 17:59:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42195, Invalid=42195, Unknown=0, NotChecked=0, Total=84390 [2022-11-25 17:59:28,139 INFO L87 Difference]: Start difference. First operand 501 states and 575 transitions. Second operand has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 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 17:59:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:30,368 INFO L93 Difference]: Finished difference Result 1004 states and 1297 transitions. [2022-11-25 17:59:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2022-11-25 17:59:30,369 INFO L78 Accepts]: Start accepts. Automaton has has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 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 500 [2022-11-25 17:59:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:30,407 INFO L225 Difference]: With dead ends: 1004 [2022-11-25 17:59:30,408 INFO L226 Difference]: Without dead ends: 791 [2022-11-25 17:59:30,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=42195, Invalid=42195, Unknown=0, NotChecked=0, Total=84390 [2022-11-25 17:59:30,414 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:30,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:59:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-11-25 17:59:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 791. [2022-11-25 17:59:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.0949367088607596) internal successors, (865), 790 states have internal predecessors, (865), 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 17:59:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 865 transitions. [2022-11-25 17:59:30,444 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 865 transitions. Word has length 500 [2022-11-25 17:59:30,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:30,445 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 865 transitions. [2022-11-25 17:59:30,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 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 17:59:30,446 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 865 transitions. [2022-11-25 17:59:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2022-11-25 17:59:30,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:30,452 INFO L195 NwaCegarLoop]: trace histogram [340, 288, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:30,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:59:30,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:59:30,658 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:59:30,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1077236000, now seen corresponding path program 11 times [2022-11-25 17:59:30,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:59:30,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612765540] [2022-11-25 17:59:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:30,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:59:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 29767 proven. 83232 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-11-25 18:00:23,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:00:23,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612765540] [2022-11-25 18:00:23,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612765540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:00:23,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596639054] [2022-11-25 18:00:23,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:00:23,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:00:23,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:00:23,960 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:00:23,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:00:24,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 298 check-sat command(s) [2022-11-25 18:00:24,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:00:25,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 151 conjunts are in the unsatisfiable core [2022-11-25 18:00:25,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-11-25 18:01:08,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-11-25 18:02:09,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596639054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:09,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:09,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [291, 151, 151] total 589 [2022-11-25 18:02:09,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585086422] [2022-11-25 18:02:09,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:09,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 589 states [2022-11-25 18:02:09,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:09,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 589 interpolants. [2022-11-25 18:02:09,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173166, Invalid=173166, Unknown=0, NotChecked=0, Total=346332 [2022-11-25 18:02:09,152 INFO L87 Difference]: Start difference. First operand 791 states and 865 transitions. Second operand has 589 states, 589 states have (on average 2.2275042444821733) internal successors, (1312), 589 states have internal predecessors, (1312), 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 18:07:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:07:08,644 INFO L93 Difference]: Finished difference Result 2078 states and 2763 transitions. [2022-11-25 18:07:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 589 states. [2022-11-25 18:07:08,646 INFO L78 Accepts]: Start accepts. Automaton has has 589 states, 589 states have (on average 2.2275042444821733) internal successors, (1312), 589 states have internal predecessors, (1312), 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 790 [2022-11-25 18:07:08,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:07:08,652 INFO L225 Difference]: With dead ends: 2078 [2022-11-25 18:07:08,653 INFO L226 Difference]: Without dead ends: 1865 [2022-11-25 18:07:08,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1869 GetRequests, 1282 SyntacticMatches, 0 SemanticMatches, 587 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 135.2s TimeCoverageRelationStatistics Valid=173166, Invalid=173166, Unknown=0, NotChecked=0, Total=346332 [2022-11-25 18:07:08,670 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2019 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 2524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:07:08,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2019 Valid, 327 Invalid, 2524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 18:07:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-11-25 18:07:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1865. [2022-11-25 18:07:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 1.1840128755364807) internal successors, (2207), 1864 states have internal predecessors, (2207), 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 18:07:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2207 transitions. [2022-11-25 18:07:08,727 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2207 transitions. Word has length 790 [2022-11-25 18:07:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:07:08,728 INFO L495 AbstractCegarLoop]: Abstraction has 1865 states and 2207 transitions. [2022-11-25 18:07:08,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 589 states, 589 states have (on average 2.2275042444821733) internal successors, (1312), 589 states have internal predecessors, (1312), 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 18:07:08,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2207 transitions. [2022-11-25 18:07:08,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1865 [2022-11-25 18:07:08,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:07:08,748 INFO L195 NwaCegarLoop]: trace histogram [609, 320, 320, 298, 289, 22, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:08,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:07:08,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:07:08,949 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:07:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:08,949 INFO L85 PathProgramCache]: Analyzing trace with hash -944903505, now seen corresponding path program 12 times [2022-11-25 18:07:08,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:08,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271786264] [2022-11-25 18:07:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:08,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 185310 proven. 83810 refuted. 0 times theorem prover too weak. 203841 trivial. 0 not checked. [2022-11-25 18:08:33,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:33,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271786264] [2022-11-25 18:08:33,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271786264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:33,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793328786] [2022-11-25 18:08:33,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:08:33,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:33,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:33,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:33,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 18:08:34,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-11-25 18:08:34,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 18:08:34,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-11-25 18:08:39,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:08:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-11-25 18:08:45,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793328786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:08:45,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:08:45,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [292, 25, 25] total 338 [2022-11-25 18:08:45,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25651211] [2022-11-25 18:08:45,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:08:45,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 338 states [2022-11-25 18:08:45,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:45,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 338 interpolants. [2022-11-25 18:08:45,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56953, Invalid=56953, Unknown=0, NotChecked=0, Total=113906 [2022-11-25 18:08:45,777 INFO L87 Difference]: Start difference. First operand 1865 states and 2207 transitions. Second operand has 338 states, 338 states have (on average 2.304733727810651) internal successors, (779), 338 states have internal predecessors, (779), 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 18:08:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:08:55,252 INFO L93 Difference]: Finished difference Result 3248 states and 4005 transitions. [2022-11-25 18:08:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 338 states. [2022-11-25 18:08:55,254 INFO L78 Accepts]: Start accepts. Automaton has has 338 states, 338 states have (on average 2.304733727810651) internal successors, (779), 338 states have internal predecessors, (779), 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 1864 [2022-11-25 18:08:55,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:08:55,260 INFO L225 Difference]: With dead ends: 3248 [2022-11-25 18:08:55,261 INFO L226 Difference]: Without dead ends: 1963 [2022-11-25 18:08:55,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4018 GetRequests, 3682 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=56953, Invalid=56953, Unknown=0, NotChecked=0, Total=113906 [2022-11-25 18:08:55,269 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 18:08:55,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 77 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 18:08:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-25 18:08:55,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1963. [2022-11-25 18:08:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 1.1992864424057084) internal successors, (2353), 1962 states have internal predecessors, (2353), 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 18:08:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 2353 transitions. [2022-11-25 18:08:55,328 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 2353 transitions. Word has length 1864 [2022-11-25 18:08:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:08:55,329 INFO L495 AbstractCegarLoop]: Abstraction has 1963 states and 2353 transitions. [2022-11-25 18:08:55,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 338 states, 338 states have (on average 2.304733727810651) internal successors, (779), 338 states have internal predecessors, (779), 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 18:08:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 2353 transitions. [2022-11-25 18:08:55,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1963 [2022-11-25 18:08:55,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:08:55,358 INFO L195 NwaCegarLoop]: trace histogram [634, 344, 344, 298, 290, 46, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:55,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:55,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 18:08:55,570 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:08:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:55,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1262359994, now seen corresponding path program 13 times [2022-11-25 18:08:55,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:55,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224402429] [2022-11-25 18:08:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:55,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-11-25 18:10:24,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:24,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224402429] [2022-11-25 18:10:24,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224402429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:10:24,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998741845] [2022-11-25 18:10:24,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:10:24,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:24,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:24,672 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:10:24,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b4c8eef-eea4-42af-9207-f4c8ee399af8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 18:10:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:25,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 3607 conjuncts, 292 conjunts are in the unsatisfiable core [2022-11-25 18:10:25,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-11-25 18:10:26,297 INFO L328 TraceCheckSpWp]: Computing backward predicates...