./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8 --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 d0cee5b1964cd71f7406ad577c9568bfea84778de80728dfc08113baa4a027fc --- 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-2329fc7 [2022-12-13 17:14:47,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:14:47,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:14:47,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:14:47,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:14:47,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:14:47,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:14:47,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:14:47,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:14:47,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:14:47,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:14:47,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:14:47,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:14:47,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:14:47,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:14:47,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:14:47,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:14:47,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:14:47,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:14:47,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:14:47,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:14:47,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:14:47,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:14:47,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:14:47,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:14:47,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:14:47,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:14:47,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:14:47,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:14:48,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:14:48,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:14:48,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:14:48,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:14:48,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:14:48,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:14:48,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:14:48,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:14:48,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:14:48,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:14:48,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:14:48,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:14:48,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:14:48,027 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:14:48,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:14:48,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:14:48,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:14:48,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:14:48,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:14:48,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:14:48,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:14:48,029 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:14:48,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:14:48,030 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:14:48,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:14:48,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:14:48,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:14:48,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:14:48,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:14:48,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:14:48,036 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:14:48,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:14:48,037 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:14:48,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:14:48,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:14:48,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:14:48,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:14:48,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:14:48,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:14:48,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:14:48,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:14:48,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:14:48,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:14:48,038 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:14:48,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:14:48,039 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:14:48,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:14:48,039 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:14:48,039 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_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0cee5b1964cd71f7406ad577c9568bfea84778de80728dfc08113baa4a027fc [2022-12-13 17:14:48,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:14:48,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:14:48,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:14:48,281 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:14:48,281 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:14:48,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2022-12-13 17:14:50,929 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:14:51,117 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:14:51,118 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2022-12-13 17:14:51,125 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/data/3d9ad1dc7/a99b61a1d1ff4d12a548c4456230fca3/FLAGc73fdec11 [2022-12-13 17:14:51,482 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/data/3d9ad1dc7/a99b61a1d1ff4d12a548c4456230fca3 [2022-12-13 17:14:51,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:14:51,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:14:51,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:14:51,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:14:51,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:14:51,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a448353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51, skipping insertion in model container [2022-12-13 17:14:51,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:14:51,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:14:51,665 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_eee9285b-c332-43af-b625-b9fa3ecefd4d/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2022-12-13 17:14:51,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:14:51,679 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:14:51,710 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_eee9285b-c332-43af-b625-b9fa3ecefd4d/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2022-12-13 17:14:51,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:14:51,725 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:14:51,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51 WrapperNode [2022-12-13 17:14:51,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:14:51,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:14:51,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:14:51,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:14:51,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,761 INFO L138 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 229 [2022-12-13 17:14:51,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:14:51,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:14:51,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:14:51,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:14:51,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,786 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:14:51,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:14:51,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:14:51,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:14:51,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (1/1) ... [2022-12-13 17:14:51,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:14:51,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:14:51,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:14:51,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:14:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:14:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:14:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:14:51,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:14:51,929 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:14:51,931 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:14:52,170 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:14:52,175 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:14:52,175 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 17:14:52,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:14:52 BoogieIcfgContainer [2022-12-13 17:14:52,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:14:52,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:14:52,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:14:52,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:14:52,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:14:51" (1/3) ... [2022-12-13 17:14:52,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36147a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:14:52, skipping insertion in model container [2022-12-13 17:14:52,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:14:51" (2/3) ... [2022-12-13 17:14:52,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36147a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:14:52, skipping insertion in model container [2022-12-13 17:14:52,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:14:52" (3/3) ... [2022-12-13 17:14:52,185 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2022-12-13 17:14:52,199 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:14:52,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:14:52,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:14:52,237 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;@5519c25e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:14:52,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 17:14:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 68 states have internal predecessors, (114), 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) [2022-12-13 17:14:52,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 17:14:52,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:14:52,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:52,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:14:52,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1425545932, now seen corresponding path program 1 times [2022-12-13 17:14:52,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:52,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191084876] [2022-12-13 17:14:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:52,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:52,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191084876] [2022-12-13 17:14:52,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191084876] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:52,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:52,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:14:52,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485020927] [2022-12-13 17:14:52,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:52,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:14:52,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:14:52,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:14:52,551 INFO L87 Difference]: Start difference. First operand has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 68 states have internal predecessors, (114), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-12-13 17:14:52,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:14:52,630 INFO L93 Difference]: Finished difference Result 115 states and 189 transitions. [2022-12-13 17:14:52,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:14:52,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2022-12-13 17:14:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:14:52,640 INFO L225 Difference]: With dead ends: 115 [2022-12-13 17:14:52,640 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 17:14:52,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:14:52,646 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 3 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:14:52,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 400 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:14:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 17:14:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-12-13 17:14:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.40625) internal successors, (90), 64 states have internal predecessors, (90), 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) [2022-12-13 17:14:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2022-12-13 17:14:52,676 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 25 [2022-12-13 17:14:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:14:52,676 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2022-12-13 17:14:52,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-12-13 17:14:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2022-12-13 17:14:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 17:14:52,678 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:14:52,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:52,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:14:52,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:14:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1477219222, now seen corresponding path program 1 times [2022-12-13 17:14:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:52,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81323706] [2022-12-13 17:14:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:52,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:52,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81323706] [2022-12-13 17:14:52,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81323706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:52,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:52,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:14:52,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393227069] [2022-12-13 17:14:52,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:52,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:14:52,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:52,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:14:52,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:14:52,781 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2022-12-13 17:14:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:14:52,807 INFO L93 Difference]: Finished difference Result 141 states and 210 transitions. [2022-12-13 17:14:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:14:52,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2022-12-13 17:14:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:14:52,809 INFO L225 Difference]: With dead ends: 141 [2022-12-13 17:14:52,809 INFO L226 Difference]: Without dead ends: 99 [2022-12-13 17:14:52,810 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 [2022-12-13 17:14:52,811 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 51 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:14:52,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 187 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:14:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-13 17:14:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-12-13 17:14:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 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) [2022-12-13 17:14:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 141 transitions. [2022-12-13 17:14:52,824 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 141 transitions. Word has length 41 [2022-12-13 17:14:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:14:52,824 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 141 transitions. [2022-12-13 17:14:52,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2022-12-13 17:14:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 141 transitions. [2022-12-13 17:14:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 17:14:52,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:14:52,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:52,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:14:52,826 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:14:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:52,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1000300971, now seen corresponding path program 1 times [2022-12-13 17:14:52,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:52,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465662597] [2022-12-13 17:14:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:52,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:52,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:52,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465662597] [2022-12-13 17:14:52,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465662597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:52,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:52,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:14:52,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055079387] [2022-12-13 17:14:52,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:52,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:14:52,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:52,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:14:52,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:14:52,947 INFO L87 Difference]: Start difference. First operand 97 states and 141 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2022-12-13 17:14:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:14:53,029 INFO L93 Difference]: Finished difference Result 393 states and 613 transitions. [2022-12-13 17:14:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:14:53,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 41 [2022-12-13 17:14:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:14:53,032 INFO L225 Difference]: With dead ends: 393 [2022-12-13 17:14:53,033 INFO L226 Difference]: Without dead ends: 319 [2022-12-13 17:14:53,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:14:53,034 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 397 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:14:53,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 370 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:14:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-12-13 17:14:53,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 169. [2022-12-13 17:14:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5119047619047619) internal successors, (254), 168 states have internal predecessors, (254), 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) [2022-12-13 17:14:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 254 transitions. [2022-12-13 17:14:53,059 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 254 transitions. Word has length 41 [2022-12-13 17:14:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:14:53,060 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 254 transitions. [2022-12-13 17:14:53,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2022-12-13 17:14:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 254 transitions. [2022-12-13 17:14:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 17:14:53,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:14:53,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:53,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:14:53,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:14:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash 561235574, now seen corresponding path program 1 times [2022-12-13 17:14:53,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:53,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422771063] [2022-12-13 17:14:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:53,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:53,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:53,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422771063] [2022-12-13 17:14:53,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422771063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:53,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:53,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:14:53,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990914548] [2022-12-13 17:14:53,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:53,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:14:53,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:14:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:14:53,260 INFO L87 Difference]: Start difference. First operand 169 states and 254 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2022-12-13 17:14:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:14:53,326 INFO L93 Difference]: Finished difference Result 331 states and 501 transitions. [2022-12-13 17:14:53,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:14:53,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 [2022-12-13 17:14:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:14:53,328 INFO L225 Difference]: With dead ends: 331 [2022-12-13 17:14:53,328 INFO L226 Difference]: Without dead ends: 329 [2022-12-13 17:14:53,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:14:53,330 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 180 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 404 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 [2022-12-13 17:14:53,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 404 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:14:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-12-13 17:14:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 181. [2022-12-13 17:14:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4777777777777779) internal successors, (266), 180 states have internal predecessors, (266), 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) [2022-12-13 17:14:53,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 266 transitions. [2022-12-13 17:14:53,354 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 266 transitions. Word has length 42 [2022-12-13 17:14:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:14:53,354 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 266 transitions. [2022-12-13 17:14:53,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2022-12-13 17:14:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 266 transitions. [2022-12-13 17:14:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:14:53,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:14:53,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:53,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:14:53,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:14:53,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash 271012067, now seen corresponding path program 1 times [2022-12-13 17:14:53,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:53,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217303960] [2022-12-13 17:14:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:53,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:53,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:53,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217303960] [2022-12-13 17:14:53,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217303960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:53,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:53,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:14:53,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613335373] [2022-12-13 17:14:53,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:53,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:14:53,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:53,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:14:53,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:14:53,413 INFO L87 Difference]: Start difference. First operand 181 states and 266 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2022-12-13 17:14:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:14:53,446 INFO L93 Difference]: Finished difference Result 467 states and 702 transitions. [2022-12-13 17:14:53,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:14:53,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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 43 [2022-12-13 17:14:53,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:14:53,447 INFO L225 Difference]: With dead ends: 467 [2022-12-13 17:14:53,447 INFO L226 Difference]: Without dead ends: 309 [2022-12-13 17:14:53,448 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 [2022-12-13 17:14:53,449 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 39 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:14:53,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 149 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:14:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-12-13 17:14:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 303. [2022-12-13 17:14:53,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.4768211920529801) internal successors, (446), 302 states have internal predecessors, (446), 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) [2022-12-13 17:14:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 446 transitions. [2022-12-13 17:14:53,467 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 446 transitions. Word has length 43 [2022-12-13 17:14:53,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:14:53,467 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 446 transitions. [2022-12-13 17:14:53,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2022-12-13 17:14:53,468 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 446 transitions. [2022-12-13 17:14:53,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 17:14:53,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:14:53,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:53,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:14:53,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:14:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:53,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1222671217, now seen corresponding path program 1 times [2022-12-13 17:14:53,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:53,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101188816] [2022-12-13 17:14:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:53,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:53,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:53,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101188816] [2022-12-13 17:14:53,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101188816] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:53,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:53,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:14:53,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23739522] [2022-12-13 17:14:53,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:53,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:14:53,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:53,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:14:53,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:14:53,526 INFO L87 Difference]: Start difference. First operand 303 states and 446 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-12-13 17:14:53,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:14:53,578 INFO L93 Difference]: Finished difference Result 799 states and 1180 transitions. [2022-12-13 17:14:53,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:14:53,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2022-12-13 17:14:53,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:14:53,580 INFO L225 Difference]: With dead ends: 799 [2022-12-13 17:14:53,580 INFO L226 Difference]: Without dead ends: 519 [2022-12-13 17:14:53,581 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 [2022-12-13 17:14:53,581 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 47 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:14:53,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 185 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:14:53,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-12-13 17:14:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 517. [2022-12-13 17:14:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.449612403100775) internal successors, (748), 516 states have internal predecessors, (748), 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) [2022-12-13 17:14:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 748 transitions. [2022-12-13 17:14:53,613 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 748 transitions. Word has length 44 [2022-12-13 17:14:53,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:14:53,614 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 748 transitions. [2022-12-13 17:14:53,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-12-13 17:14:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 748 transitions. [2022-12-13 17:14:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 17:14:53,614 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:14:53,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:53,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:14:53,615 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:14:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1273029565, now seen corresponding path program 1 times [2022-12-13 17:14:53,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:53,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652546233] [2022-12-13 17:14:53,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:53,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:53,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:53,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652546233] [2022-12-13 17:14:53,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652546233] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:53,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:53,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:14:53,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822259485] [2022-12-13 17:14:53,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:53,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:14:53,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:14:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:14:53,645 INFO L87 Difference]: Start difference. First operand 517 states and 748 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2022-12-13 17:14:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:14:53,722 INFO L93 Difference]: Finished difference Result 1004 states and 1466 transitions. [2022-12-13 17:14:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:14:53,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 45 [2022-12-13 17:14:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:14:53,725 INFO L225 Difference]: With dead ends: 1004 [2022-12-13 17:14:53,725 INFO L226 Difference]: Without dead ends: 721 [2022-12-13 17:14:53,726 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 [2022-12-13 17:14:53,727 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 52 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:14:53,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 197 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:14:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-12-13 17:14:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 719. [2022-12-13 17:14:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.434540389972145) internal successors, (1030), 718 states have internal predecessors, (1030), 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) [2022-12-13 17:14:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1030 transitions. [2022-12-13 17:14:53,806 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1030 transitions. Word has length 45 [2022-12-13 17:14:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:14:53,806 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 1030 transitions. [2022-12-13 17:14:53,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2022-12-13 17:14:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1030 transitions. [2022-12-13 17:14:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:14:53,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:14:53,808 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:53,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:14:53,808 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:14:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1258504631, now seen corresponding path program 1 times [2022-12-13 17:14:53,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:53,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724745051] [2022-12-13 17:14:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:53,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:14:53,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:53,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724745051] [2022-12-13 17:14:53,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724745051] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:53,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:53,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:14:53,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131052772] [2022-12-13 17:14:53,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:53,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:14:53,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:53,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:14:53,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:14:53,918 INFO L87 Difference]: Start difference. First operand 719 states and 1030 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-12-13 17:14:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:14:54,067 INFO L93 Difference]: Finished difference Result 1659 states and 2418 transitions. [2022-12-13 17:14:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:14:54,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 63 [2022-12-13 17:14:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:14:54,072 INFO L225 Difference]: With dead ends: 1659 [2022-12-13 17:14:54,073 INFO L226 Difference]: Without dead ends: 1305 [2022-12-13 17:14:54,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:14:54,074 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 235 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:14:54,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 403 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:14:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2022-12-13 17:14:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1059. [2022-12-13 17:14:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 1.438563327032136) internal successors, (1522), 1058 states have internal predecessors, (1522), 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) [2022-12-13 17:14:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1522 transitions. [2022-12-13 17:14:54,150 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1522 transitions. Word has length 63 [2022-12-13 17:14:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:14:54,150 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1522 transitions. [2022-12-13 17:14:54,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-12-13 17:14:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1522 transitions. [2022-12-13 17:14:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:14:54,151 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:14:54,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:54,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:14:54,151 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:14:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash -26861640, now seen corresponding path program 1 times [2022-12-13 17:14:54,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:54,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442762591] [2022-12-13 17:14:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:54,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 17:14:54,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:54,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442762591] [2022-12-13 17:14:54,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442762591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:54,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:54,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:14:54,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039298349] [2022-12-13 17:14:54,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:54,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:14:54,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:54,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:14:54,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:14:54,236 INFO L87 Difference]: Start difference. First operand 1059 states and 1522 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2022-12-13 17:14:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:14:54,399 INFO L93 Difference]: Finished difference Result 1999 states and 2910 transitions. [2022-12-13 17:14:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:14:54,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 63 [2022-12-13 17:14:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:14:54,403 INFO L225 Difference]: With dead ends: 1999 [2022-12-13 17:14:54,403 INFO L226 Difference]: Without dead ends: 1645 [2022-12-13 17:14:54,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:14:54,404 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 241 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:14:54,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 381 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:14:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-12-13 17:14:54,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1399. [2022-12-13 17:14:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 1.4406294706723892) internal successors, (2014), 1398 states have internal predecessors, (2014), 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) [2022-12-13 17:14:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 2014 transitions. [2022-12-13 17:14:54,503 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 2014 transitions. Word has length 63 [2022-12-13 17:14:54,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:14:54,504 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 2014 transitions. [2022-12-13 17:14:54,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2022-12-13 17:14:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 2014 transitions. [2022-12-13 17:14:54,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 17:14:54,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:14:54,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:54,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:14:54,505 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:14:54,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:54,506 INFO L85 PathProgramCache]: Analyzing trace with hash -618172044, now seen corresponding path program 1 times [2022-12-13 17:14:54,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:54,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300178073] [2022-12-13 17:14:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:54,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:54,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:54,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300178073] [2022-12-13 17:14:54,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300178073] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:54,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:54,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:14:54,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688610728] [2022-12-13 17:14:54,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:54,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:14:54,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:54,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:14:54,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:14:54,575 INFO L87 Difference]: Start difference. First operand 1399 states and 2014 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2022-12-13 17:14:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:14:54,682 INFO L93 Difference]: Finished difference Result 2775 states and 4004 transitions. [2022-12-13 17:14:54,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:14:54,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2022-12-13 17:14:54,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:14:54,687 INFO L225 Difference]: With dead ends: 2775 [2022-12-13 17:14:54,687 INFO L226 Difference]: Without dead ends: 1401 [2022-12-13 17:14:54,689 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 [2022-12-13 17:14:54,689 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 42 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:14:54,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 185 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:14:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-12-13 17:14:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1399. [2022-12-13 17:14:54,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 1.4234620886981402) internal successors, (1990), 1398 states have internal predecessors, (1990), 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) [2022-12-13 17:14:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1990 transitions. [2022-12-13 17:14:54,784 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 1990 transitions. Word has length 64 [2022-12-13 17:14:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:14:54,784 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 1990 transitions. [2022-12-13 17:14:54,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2022-12-13 17:14:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 1990 transitions. [2022-12-13 17:14:54,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 17:14:54,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:14:54,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:14:54,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 17:14:54,786 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:14:54,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:54,786 INFO L85 PathProgramCache]: Analyzing trace with hash -231923725, now seen corresponding path program 1 times [2022-12-13 17:14:54,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:54,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494735795] [2022-12-13 17:14:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:54,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:14:55,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:55,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494735795] [2022-12-13 17:14:55,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494735795] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:14:55,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734710333] [2022-12-13 17:14:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:55,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:14:55,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:14:55,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:14:55,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:14:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:55,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:14:55,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:14:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:14:56,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:14:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:14:56,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734710333] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:14:56,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:14:56,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 17 [2022-12-13 17:14:56,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305504146] [2022-12-13 17:14:56,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:14:56,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:14:56,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:56,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:14:56,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:14:56,194 INFO L87 Difference]: Start difference. First operand 1399 states and 1990 transitions. Second operand has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 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) [2022-12-13 17:15:01,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:15:01,334 INFO L93 Difference]: Finished difference Result 14593 states and 20550 transitions. [2022-12-13 17:15:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 17:15:01,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 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 64 [2022-12-13 17:15:01,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:15:01,371 INFO L225 Difference]: With dead ends: 14593 [2022-12-13 17:15:01,371 INFO L226 Difference]: Without dead ends: 13631 [2022-12-13 17:15:01,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2310 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1234, Invalid=5408, Unknown=0, NotChecked=0, Total=6642 [2022-12-13 17:15:01,375 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 3840 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3840 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 17:15:01,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3840 Valid, 2283 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 17:15:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13631 states. [2022-12-13 17:15:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13631 to 6643. [2022-12-13 17:15:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 6642 states have (on average 1.394459500150557) internal successors, (9262), 6642 states have internal predecessors, (9262), 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) [2022-12-13 17:15:01,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 9262 transitions. [2022-12-13 17:15:01,943 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 9262 transitions. Word has length 64 [2022-12-13 17:15:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:15:01,943 INFO L495 AbstractCegarLoop]: Abstraction has 6643 states and 9262 transitions. [2022-12-13 17:15:01,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 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) [2022-12-13 17:15:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 9262 transitions. [2022-12-13 17:15:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 17:15:01,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:15:01,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:15:01,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:15:02,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:15:02,145 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:15:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:15:02,145 INFO L85 PathProgramCache]: Analyzing trace with hash -812650598, now seen corresponding path program 1 times [2022-12-13 17:15:02,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:15:02,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890782310] [2022-12-13 17:15:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:15:02,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:15:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:15:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:15:02,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:15:02,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890782310] [2022-12-13 17:15:02,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890782310] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:15:02,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:15:02,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:15:02,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46604504] [2022-12-13 17:15:02,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:15:02,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:15:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:15:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:15:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:15:02,206 INFO L87 Difference]: Start difference. First operand 6643 states and 9262 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2022-12-13 17:15:02,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:15:02,742 INFO L93 Difference]: Finished difference Result 10481 states and 14706 transitions. [2022-12-13 17:15:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:15:02,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 65 [2022-12-13 17:15:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:15:02,757 INFO L225 Difference]: With dead ends: 10481 [2022-12-13 17:15:02,757 INFO L226 Difference]: Without dead ends: 9225 [2022-12-13 17:15:02,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:15:02,760 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 228 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:15:02,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 419 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:15:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9225 states. [2022-12-13 17:15:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9225 to 7889. [2022-12-13 17:15:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7889 states, 7888 states have (on average 1.3932555780933062) internal successors, (10990), 7888 states have internal predecessors, (10990), 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) [2022-12-13 17:15:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7889 states to 7889 states and 10990 transitions. [2022-12-13 17:15:03,291 INFO L78 Accepts]: Start accepts. Automaton has 7889 states and 10990 transitions. Word has length 65 [2022-12-13 17:15:03,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:15:03,291 INFO L495 AbstractCegarLoop]: Abstraction has 7889 states and 10990 transitions. [2022-12-13 17:15:03,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2022-12-13 17:15:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7889 states and 10990 transitions. [2022-12-13 17:15:03,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 17:15:03,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:15:03,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:15:03,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 17:15:03,292 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:15:03,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:15:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1363863293, now seen corresponding path program 1 times [2022-12-13 17:15:03,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:15:03,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651582296] [2022-12-13 17:15:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:15:03,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:15:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:15:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:15:03,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:15:03,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651582296] [2022-12-13 17:15:03,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651582296] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:15:03,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:15:03,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:15:03,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424884358] [2022-12-13 17:15:03,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:15:03,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:15:03,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:15:03,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:15:03,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:15:03,343 INFO L87 Difference]: Start difference. First operand 7889 states and 10990 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2022-12-13 17:15:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:15:03,564 INFO L93 Difference]: Finished difference Result 11284 states and 15685 transitions. [2022-12-13 17:15:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:15:03,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2022-12-13 17:15:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:15:03,571 INFO L225 Difference]: With dead ends: 11284 [2022-12-13 17:15:03,571 INFO L226 Difference]: Without dead ends: 3420 [2022-12-13 17:15:03,578 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 [2022-12-13 17:15:03,578 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 34 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:15:03,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 172 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:15:03,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2022-12-13 17:15:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 3418. [2022-12-13 17:15:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3417 states have (on average 1.3590869183494294) internal successors, (4644), 3417 states have internal predecessors, (4644), 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) [2022-12-13 17:15:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 4644 transitions. [2022-12-13 17:15:03,818 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 4644 transitions. Word has length 66 [2022-12-13 17:15:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:15:03,819 INFO L495 AbstractCegarLoop]: Abstraction has 3418 states and 4644 transitions. [2022-12-13 17:15:03,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-12-13 17:15:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 4644 transitions. [2022-12-13 17:15:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 17:15:03,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:15:03,819 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:15:03,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 17:15:03,820 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:15:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:15:03,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1441709853, now seen corresponding path program 1 times [2022-12-13 17:15:03,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:15:03,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429833621] [2022-12-13 17:15:03,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:15:03,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:15:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:15:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:15:04,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:15:04,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429833621] [2022-12-13 17:15:04,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429833621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:15:04,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620136383] [2022-12-13 17:15:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:15:04,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:15:04,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:15:04,085 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:15:04,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:15:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:15:04,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 17:15:04,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:15:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:15:04,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:15:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:15:05,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620136383] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:15:05,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:15:05,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2022-12-13 17:15:05,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756191656] [2022-12-13 17:15:05,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:15:05,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 17:15:05,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:15:05,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 17:15:05,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-12-13 17:15:05,970 INFO L87 Difference]: Start difference. First operand 3418 states and 4644 transitions. Second operand has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 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) [2022-12-13 17:15:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:15:09,286 INFO L93 Difference]: Finished difference Result 21525 states and 28728 transitions. [2022-12-13 17:15:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 17:15:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 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 68 [2022-12-13 17:15:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:15:09,309 INFO L225 Difference]: With dead ends: 21525 [2022-12-13 17:15:09,310 INFO L226 Difference]: Without dead ends: 18144 [2022-12-13 17:15:09,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1290, Invalid=3822, Unknown=0, NotChecked=0, Total=5112 [2022-12-13 17:15:09,315 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1167 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:15:09,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1167 Valid, 1483 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 17:15:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18144 states. [2022-12-13 17:15:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18144 to 7763. [2022-12-13 17:15:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7763 states, 7762 states have (on average 1.3347075496006184) internal successors, (10360), 7762 states have internal predecessors, (10360), 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) [2022-12-13 17:15:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7763 states to 7763 states and 10360 transitions. [2022-12-13 17:15:10,004 INFO L78 Accepts]: Start accepts. Automaton has 7763 states and 10360 transitions. Word has length 68 [2022-12-13 17:15:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:15:10,004 INFO L495 AbstractCegarLoop]: Abstraction has 7763 states and 10360 transitions. [2022-12-13 17:15:10,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 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) [2022-12-13 17:15:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 7763 states and 10360 transitions. [2022-12-13 17:15:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 17:15:10,005 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:15:10,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:15:10,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:15:10,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:15:10,207 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:15:10,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:15:10,208 INFO L85 PathProgramCache]: Analyzing trace with hash -737912097, now seen corresponding path program 1 times [2022-12-13 17:15:10,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:15:10,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314667829] [2022-12-13 17:15:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:15:10,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:15:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:15:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:15:10,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:15:10,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314667829] [2022-12-13 17:15:10,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314667829] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:15:10,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926232982] [2022-12-13 17:15:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:15:10,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:15:10,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:15:10,526 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:15:10,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:15:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:15:10,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 17:15:10,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:15:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:15:11,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:15:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:15:16,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926232982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:15:16,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:15:16,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 18] total 39 [2022-12-13 17:15:16,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28790780] [2022-12-13 17:15:16,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:15:16,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 17:15:16,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:15:16,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 17:15:16,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 17:15:16,326 INFO L87 Difference]: Start difference. First operand 7763 states and 10360 transitions. Second operand has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 states have internal predecessors, (183), 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) [2022-12-13 17:16:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:16:33,819 INFO L93 Difference]: Finished difference Result 93685 states and 123293 transitions. [2022-12-13 17:16:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 415 states. [2022-12-13 17:16:33,820 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 states have internal predecessors, (183), 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 68 [2022-12-13 17:16:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:16:33,932 INFO L225 Difference]: With dead ends: 93685 [2022-12-13 17:16:33,932 INFO L226 Difference]: Without dead ends: 85964 [2022-12-13 17:16:33,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92744 ImplicationChecksByTransitivity, 59.5s TimeCoverageRelationStatistics Valid=32479, Invalid=168673, Unknown=0, NotChecked=0, Total=201152 [2022-12-13 17:16:33,975 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 8067 mSDsluCounter, 7567 mSDsCounter, 0 mSdLazyCounter, 7100 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8067 SdHoareTripleChecker+Valid, 8120 SdHoareTripleChecker+Invalid, 7408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 7100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:16:33,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8067 Valid, 8120 Invalid, 7408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 7100 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-12-13 17:16:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85964 states. [2022-12-13 17:16:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85964 to 30277. [2022-12-13 17:16:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30277 states, 30276 states have (on average 1.322103316158013) internal successors, (40028), 30276 states have internal predecessors, (40028), 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) [2022-12-13 17:16:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30277 states to 30277 states and 40028 transitions. [2022-12-13 17:16:38,235 INFO L78 Accepts]: Start accepts. Automaton has 30277 states and 40028 transitions. Word has length 68 [2022-12-13 17:16:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:16:38,235 INFO L495 AbstractCegarLoop]: Abstraction has 30277 states and 40028 transitions. [2022-12-13 17:16:38,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 states have internal predecessors, (183), 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) [2022-12-13 17:16:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 30277 states and 40028 transitions. [2022-12-13 17:16:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 17:16:38,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:16:38,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:16:38,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:16:38,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 17:16:38,438 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:16:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:16:38,438 INFO L85 PathProgramCache]: Analyzing trace with hash 524526898, now seen corresponding path program 1 times [2022-12-13 17:16:38,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:16:38,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032037319] [2022-12-13 17:16:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:16:38,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:16:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:16:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:16:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:16:38,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032037319] [2022-12-13 17:16:38,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032037319] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:16:38,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:16:38,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:16:38,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598517857] [2022-12-13 17:16:38,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:16:38,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:16:38,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:16:38,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:16:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:16:38,479 INFO L87 Difference]: Start difference. First operand 30277 states and 40028 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-12-13 17:16:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:16:44,212 INFO L93 Difference]: Finished difference Result 66395 states and 87984 transitions. [2022-12-13 17:16:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:16:44,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-12-13 17:16:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:16:44,246 INFO L225 Difference]: With dead ends: 66395 [2022-12-13 17:16:44,246 INFO L226 Difference]: Without dead ends: 37959 [2022-12-13 17:16:44,262 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 [2022-12-13 17:16:44,263 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 41 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:16:44,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 172 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:16:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37959 states. [2022-12-13 17:16:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37959 to 35721. [2022-12-13 17:16:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35721 states, 35720 states have (on average 1.3041153415453528) internal successors, (46583), 35720 states have internal predecessors, (46583), 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) [2022-12-13 17:16:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35721 states to 35721 states and 46583 transitions. [2022-12-13 17:16:49,126 INFO L78 Accepts]: Start accepts. Automaton has 35721 states and 46583 transitions. Word has length 69 [2022-12-13 17:16:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:16:49,127 INFO L495 AbstractCegarLoop]: Abstraction has 35721 states and 46583 transitions. [2022-12-13 17:16:49,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-12-13 17:16:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 35721 states and 46583 transitions. [2022-12-13 17:16:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 17:16:49,129 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:16:49,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:16:49,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 17:16:49,129 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:16:49,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:16:49,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2047653349, now seen corresponding path program 1 times [2022-12-13 17:16:49,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:16:49,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719144199] [2022-12-13 17:16:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:16:49,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:16:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:16:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:16:49,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:16:49,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719144199] [2022-12-13 17:16:49,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719144199] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:16:49,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:16:49,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:16:49,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959037587] [2022-12-13 17:16:49,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:16:49,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:16:49,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:16:49,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:16:49,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:16:49,166 INFO L87 Difference]: Start difference. First operand 35721 states and 46583 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-12-13 17:16:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:16:57,209 INFO L93 Difference]: Finished difference Result 93754 states and 121888 transitions. [2022-12-13 17:16:57,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:16:57,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-12-13 17:16:57,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:16:57,271 INFO L225 Difference]: With dead ends: 93754 [2022-12-13 17:16:57,272 INFO L226 Difference]: Without dead ends: 58884 [2022-12-13 17:16:57,292 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 [2022-12-13 17:16:57,293 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 35 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:16:57,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 211 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:16:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58884 states. [2022-12-13 17:17:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58884 to 46567. [2022-12-13 17:17:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46567 states, 46566 states have (on average 1.2831035519477731) internal successors, (59749), 46566 states have internal predecessors, (59749), 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) [2022-12-13 17:17:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46567 states to 46567 states and 59749 transitions. [2022-12-13 17:17:05,018 INFO L78 Accepts]: Start accepts. Automaton has 46567 states and 59749 transitions. Word has length 69 [2022-12-13 17:17:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:17:05,018 INFO L495 AbstractCegarLoop]: Abstraction has 46567 states and 59749 transitions. [2022-12-13 17:17:05,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-12-13 17:17:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 46567 states and 59749 transitions. [2022-12-13 17:17:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 17:17:05,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:17:05,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:17:05,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 17:17:05,021 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:17:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:17:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1484290779, now seen corresponding path program 1 times [2022-12-13 17:17:05,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:17:05,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792966243] [2022-12-13 17:17:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:17:05,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:17:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:17:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:17:05,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:17:05,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792966243] [2022-12-13 17:17:05,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792966243] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:17:05,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:17:05,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:17:05,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309963866] [2022-12-13 17:17:05,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:17:05,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:17:05,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:17:05,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:17:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:17:05,046 INFO L87 Difference]: Start difference. First operand 46567 states and 59749 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-12-13 17:17:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:17:10,226 INFO L93 Difference]: Finished difference Result 60737 states and 77739 transitions. [2022-12-13 17:17:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:17:10,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-12-13 17:17:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:17:10,257 INFO L225 Difference]: With dead ends: 60737 [2022-12-13 17:17:10,257 INFO L226 Difference]: Without dead ends: 35466 [2022-12-13 17:17:10,271 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 [2022-12-13 17:17:10,271 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 38 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:17:10,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 217 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:17:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35466 states. [2022-12-13 17:17:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35466 to 32997. [2022-12-13 17:17:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32997 states, 32996 states have (on average 1.2597890653412536) internal successors, (41568), 32996 states have internal predecessors, (41568), 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) [2022-12-13 17:17:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32997 states to 32997 states and 41568 transitions. [2022-12-13 17:17:15,423 INFO L78 Accepts]: Start accepts. Automaton has 32997 states and 41568 transitions. Word has length 69 [2022-12-13 17:17:15,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:17:15,423 INFO L495 AbstractCegarLoop]: Abstraction has 32997 states and 41568 transitions. [2022-12-13 17:17:15,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-12-13 17:17:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 32997 states and 41568 transitions. [2022-12-13 17:17:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 17:17:15,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:17:15,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:17:15,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 17:17:15,425 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:17:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:17:15,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1857033220, now seen corresponding path program 1 times [2022-12-13 17:17:15,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:17:15,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110072294] [2022-12-13 17:17:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:17:15,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:17:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:17:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:17:15,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:17:15,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110072294] [2022-12-13 17:17:15,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110072294] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:17:15,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20381131] [2022-12-13 17:17:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:17:15,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:17:15,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:17:15,482 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:17:15,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:17:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:17:15,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:17:15,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:17:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:17:15,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:17:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:17:15,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20381131] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:17:15,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:17:15,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-12-13 17:17:15,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070081315] [2022-12-13 17:17:15,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:17:15,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:17:15,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:17:15,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:17:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:17:15,749 INFO L87 Difference]: Start difference. First operand 32997 states and 41568 transitions. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 10 states have internal predecessors, (116), 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) [2022-12-13 17:17:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:17:20,866 INFO L93 Difference]: Finished difference Result 58403 states and 73674 transitions. [2022-12-13 17:17:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:17:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 10 states have internal predecessors, (116), 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 69 [2022-12-13 17:17:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:17:20,893 INFO L225 Difference]: With dead ends: 58403 [2022-12-13 17:17:20,893 INFO L226 Difference]: Without dead ends: 30055 [2022-12-13 17:17:20,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:17:20,907 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 361 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:17:20,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 340 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:17:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30055 states. [2022-12-13 17:17:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30055 to 28130. [2022-12-13 17:17:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28130 states, 28129 states have (on average 1.2397170180241033) internal successors, (34872), 28129 states have internal predecessors, (34872), 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) [2022-12-13 17:17:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28130 states to 28130 states and 34872 transitions. [2022-12-13 17:17:25,705 INFO L78 Accepts]: Start accepts. Automaton has 28130 states and 34872 transitions. Word has length 69 [2022-12-13 17:17:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:17:25,706 INFO L495 AbstractCegarLoop]: Abstraction has 28130 states and 34872 transitions. [2022-12-13 17:17:25,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 10 states have internal predecessors, (116), 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) [2022-12-13 17:17:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 28130 states and 34872 transitions. [2022-12-13 17:17:25,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-13 17:17:25,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:17:25,709 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:17:25,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:17:25,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:17:25,910 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:17:25,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:17:25,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1838194595, now seen corresponding path program 1 times [2022-12-13 17:17:25,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:17:25,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230615210] [2022-12-13 17:17:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:17:25,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:17:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:17:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:17:25,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:17:25,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230615210] [2022-12-13 17:17:25,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230615210] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:17:25,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:17:25,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:17:25,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870276438] [2022-12-13 17:17:25,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:17:25,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:17:25,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:17:25,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:17:25,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:17:25,945 INFO L87 Difference]: Start difference. First operand 28130 states and 34872 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2022-12-13 17:17:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:17:33,544 INFO L93 Difference]: Finished difference Result 70166 states and 86919 transitions. [2022-12-13 17:17:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:17:33,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2022-12-13 17:17:33,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:17:33,584 INFO L225 Difference]: With dead ends: 70166 [2022-12-13 17:17:33,584 INFO L226 Difference]: Without dead ends: 42628 [2022-12-13 17:17:33,600 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 [2022-12-13 17:17:33,600 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 33 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:17:33,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 226 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:17:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42628 states. [2022-12-13 17:17:40,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42628 to 40844. [2022-12-13 17:17:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40844 states, 40843 states have (on average 1.2191807653698308) internal successors, (49795), 40843 states have internal predecessors, (49795), 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) [2022-12-13 17:17:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40844 states to 40844 states and 49795 transitions. [2022-12-13 17:17:40,964 INFO L78 Accepts]: Start accepts. Automaton has 40844 states and 49795 transitions. Word has length 70 [2022-12-13 17:17:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:17:40,964 INFO L495 AbstractCegarLoop]: Abstraction has 40844 states and 49795 transitions. [2022-12-13 17:17:40,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2022-12-13 17:17:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 40844 states and 49795 transitions. [2022-12-13 17:17:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-13 17:17:40,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:17:40,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:17:40,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 17:17:40,966 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:17:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:17:40,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1404516557, now seen corresponding path program 1 times [2022-12-13 17:17:40,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:17:40,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098467567] [2022-12-13 17:17:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:17:40,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:17:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:17:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:17:41,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:17:41,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098467567] [2022-12-13 17:17:41,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098467567] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:17:41,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047016318] [2022-12-13 17:17:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:17:41,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:17:41,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:17:41,594 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:17:41,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:17:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:17:41,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 17:17:41,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:17:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:17:43,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:17:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:17:45,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047016318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:17:45,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:17:45,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 38 [2022-12-13 17:17:45,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628569243] [2022-12-13 17:17:45,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:17:45,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 17:17:45,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:17:45,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 17:17:45,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 17:17:45,208 INFO L87 Difference]: Start difference. First operand 40844 states and 49795 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 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) [2022-12-13 17:19:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:19:12,825 INFO L93 Difference]: Finished difference Result 119961 states and 143563 transitions. [2022-12-13 17:19:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 405 states. [2022-12-13 17:19:12,826 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 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 70 [2022-12-13 17:19:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:19:12,928 INFO L225 Difference]: With dead ends: 119961 [2022-12-13 17:19:12,928 INFO L226 Difference]: Without dead ends: 98666 [2022-12-13 17:19:12,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96824 ImplicationChecksByTransitivity, 57.9s TimeCoverageRelationStatistics Valid=34725, Invalid=158435, Unknown=0, NotChecked=0, Total=193160 [2022-12-13 17:19:12,953 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 13073 mSDsluCounter, 4877 mSDsCounter, 0 mSdLazyCounter, 4001 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13073 SdHoareTripleChecker+Valid, 5088 SdHoareTripleChecker+Invalid, 4407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 4001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:19:12,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13073 Valid, 5088 Invalid, 4407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 4001 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-12-13 17:19:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98666 states. [2022-12-13 17:19:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98666 to 34843. [2022-12-13 17:19:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34843 states, 34842 states have (on average 1.2187589690603295) internal successors, (42464), 34842 states have internal predecessors, (42464), 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) [2022-12-13 17:19:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34843 states to 34843 states and 42464 transitions. [2022-12-13 17:19:21,131 INFO L78 Accepts]: Start accepts. Automaton has 34843 states and 42464 transitions. Word has length 70 [2022-12-13 17:19:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:19:21,131 INFO L495 AbstractCegarLoop]: Abstraction has 34843 states and 42464 transitions. [2022-12-13 17:19:21,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 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) [2022-12-13 17:19:21,131 INFO L276 IsEmpty]: Start isEmpty. Operand 34843 states and 42464 transitions. [2022-12-13 17:19:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-13 17:19:21,138 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:19:21,138 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:19:21,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:19:21,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:19:21,340 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:19:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:19:21,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1688983029, now seen corresponding path program 1 times [2022-12-13 17:19:21,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:19:21,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058229054] [2022-12-13 17:19:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:19:21,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:19:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:19:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 17:19:21,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:19:21,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058229054] [2022-12-13 17:19:21,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058229054] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:19:21,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:19:21,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:19:21,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386746575] [2022-12-13 17:19:21,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:19:21,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:19:21,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:19:21,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:19:21,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:19:21,408 INFO L87 Difference]: Start difference. First operand 34843 states and 42464 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-12-13 17:19:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:19:27,996 INFO L93 Difference]: Finished difference Result 42194 states and 51236 transitions. [2022-12-13 17:19:27,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:19:27,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 113 [2022-12-13 17:19:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:19:28,021 INFO L225 Difference]: With dead ends: 42194 [2022-12-13 17:19:28,021 INFO L226 Difference]: Without dead ends: 29333 [2022-12-13 17:19:28,029 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 [2022-12-13 17:19:28,029 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:19:28,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 196 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:19:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29333 states. [2022-12-13 17:19:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29333 to 27960. [2022-12-13 17:19:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27960 states, 27959 states have (on average 1.197038520691012) internal successors, (33468), 27959 states have internal predecessors, (33468), 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) [2022-12-13 17:19:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27960 states to 27960 states and 33468 transitions. [2022-12-13 17:19:34,487 INFO L78 Accepts]: Start accepts. Automaton has 27960 states and 33468 transitions. Word has length 113 [2022-12-13 17:19:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:19:34,487 INFO L495 AbstractCegarLoop]: Abstraction has 27960 states and 33468 transitions. [2022-12-13 17:19:34,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-12-13 17:19:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 27960 states and 33468 transitions. [2022-12-13 17:19:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-13 17:19:34,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:19:34,493 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:19:34,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 17:19:34,493 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:19:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:19:34,494 INFO L85 PathProgramCache]: Analyzing trace with hash -393594631, now seen corresponding path program 1 times [2022-12-13 17:19:34,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:19:34,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056325874] [2022-12-13 17:19:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:19:34,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:19:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:19:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:19:36,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:19:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056325874] [2022-12-13 17:19:36,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056325874] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:19:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632606749] [2022-12-13 17:19:36,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:19:36,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:19:36,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:19:36,114 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:19:36,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:19:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:19:36,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:19:36,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:19:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 49 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:19:37,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:19:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:19:42,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632606749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:19:42,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:19:42,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 15] total 49 [2022-12-13 17:19:42,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962894777] [2022-12-13 17:19:42,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:19:42,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 17:19:42,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:19:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 17:19:42,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2183, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 17:19:42,928 INFO L87 Difference]: Start difference. First operand 27960 states and 33468 transitions. Second operand has 49 states, 49 states have (on average 6.551020408163265) internal successors, (321), 49 states have internal predecessors, (321), 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) [2022-12-13 17:26:52,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:26:52,914 INFO L93 Difference]: Finished difference Result 338622 states and 403417 transitions. [2022-12-13 17:26:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1118 states. [2022-12-13 17:26:52,914 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.551020408163265) internal successors, (321), 49 states have internal predecessors, (321), 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 114 [2022-12-13 17:26:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:26:53,324 INFO L225 Difference]: With dead ends: 338622 [2022-12-13 17:26:53,324 INFO L226 Difference]: Without dead ends: 322674 [2022-12-13 17:26:53,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 186 SyntacticMatches, 19 SemanticMatches, 1162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683736 ImplicationChecksByTransitivity, 309.2s TimeCoverageRelationStatistics Valid=157546, Invalid=1196186, Unknown=0, NotChecked=0, Total=1353732 [2022-12-13 17:26:53,453 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 27718 mSDsluCounter, 14219 mSDsCounter, 0 mSdLazyCounter, 10241 mSolverCounterSat, 1254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27718 SdHoareTripleChecker+Valid, 14701 SdHoareTripleChecker+Invalid, 11495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1254 IncrementalHoareTripleChecker+Valid, 10241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-12-13 17:26:53,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27718 Valid, 14701 Invalid, 11495 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1254 Valid, 10241 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2022-12-13 17:26:53,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322674 states. [2022-12-13 17:27:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322674 to 73107. [2022-12-13 17:27:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73107 states, 73106 states have (on average 1.2015703225453451) internal successors, (87842), 73106 states have internal predecessors, (87842), 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) [2022-12-13 17:27:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73107 states to 73107 states and 87842 transitions. [2022-12-13 17:27:20,091 INFO L78 Accepts]: Start accepts. Automaton has 73107 states and 87842 transitions. Word has length 114 [2022-12-13 17:27:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:27:20,091 INFO L495 AbstractCegarLoop]: Abstraction has 73107 states and 87842 transitions. [2022-12-13 17:27:20,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.551020408163265) internal successors, (321), 49 states have internal predecessors, (321), 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) [2022-12-13 17:27:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 73107 states and 87842 transitions. [2022-12-13 17:27:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-13 17:27:20,101 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:27:20,102 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:20,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:27:20,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 17:27:20,303 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:27:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:20,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1668600571, now seen corresponding path program 1 times [2022-12-13 17:27:20,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:20,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235029301] [2022-12-13 17:27:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:20,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:20,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:20,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235029301] [2022-12-13 17:27:20,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235029301] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:20,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512402957] [2022-12-13 17:27:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:20,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:20,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:20,931 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:20,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee9285b-c332-43af-b625-b9fa3ecefd4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:27:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:21,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 17:27:21,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 24 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:22,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 24 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:29,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512402957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:29,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:29,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 22] total 59 [2022-12-13 17:27:29,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016087237] [2022-12-13 17:27:29,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:29,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-13 17:27:29,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:29,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-13 17:27:29,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3144, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 17:27:29,538 INFO L87 Difference]: Start difference. First operand 73107 states and 87842 transitions. Second operand has 59 states, 59 states have (on average 5.491525423728813) internal successors, (324), 59 states have internal predecessors, (324), 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)