./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:16:39,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:16:39,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:16:39,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:16:39,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:16:39,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:16:39,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:16:39,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:16:39,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:16:39,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:16:39,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:16:39,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:16:39,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:16:39,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:16:39,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:16:40,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:16:40,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:16:40,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:16:40,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:16:40,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:16:40,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:16:40,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:16:40,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:16:40,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:16:40,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:16:40,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:16:40,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:16:40,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:16:40,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:16:40,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:16:40,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:16:40,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:16:40,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:16:40,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:16:40,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:16:40,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:16:40,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:16:40,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:16:40,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:16:40,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:16:40,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:16:40,057 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:16:40,107 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:16:40,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:16:40,108 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:16:40,108 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:16:40,109 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:16:40,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:16:40,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:16:40,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:16:40,111 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:16:40,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:16:40,112 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:16:40,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:16:40,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:16:40,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:16:40,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:16:40,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:16:40,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:16:40,114 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:16:40,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:16:40,115 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:16:40,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:16:40,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:16:40,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:16:40,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:16:40,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:16:40,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:16:40,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:16:40,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:16:40,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:16:40,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:16:40,118 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:16:40,118 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:16:40,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:16:40,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 [2022-10-17 10:16:40,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:16:40,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:16:40,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:16:40,513 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:16:40,514 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:16:40,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2022-10-17 10:16:40,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/data/495796a2d/125a8c125bb94c458cfe09ac0fc875a2/FLAGaf9935515 [2022-10-17 10:16:41,138 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:16:41,140 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2022-10-17 10:16:41,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/data/495796a2d/125a8c125bb94c458cfe09ac0fc875a2/FLAGaf9935515 [2022-10-17 10:16:41,481 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/data/495796a2d/125a8c125bb94c458cfe09ac0fc875a2 [2022-10-17 10:16:41,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:16:41,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:16:41,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:16:41,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:16:41,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:16:41,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12a11c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41, skipping insertion in model container [2022-10-17 10:16:41,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:16:41,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:16:41,700 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2022-10-17 10:16:41,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:16:41,732 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:16:41,746 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2022-10-17 10:16:41,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:16:41,771 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:16:41,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41 WrapperNode [2022-10-17 10:16:41,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:16:41,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:16:41,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:16:41,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:16:41,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,816 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2022-10-17 10:16:41,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:16:41,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:16:41,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:16:41,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:16:41,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,843 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:16:41,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:16:41,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:16:41,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:16:41,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (1/1) ... [2022-10-17 10:16:41,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:16:41,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:41,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:16:41,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:16:41,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:16:41,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:16:41,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:16:41,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:16:41,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:16:41,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:16:41,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:16:41,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:16:42,026 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:16:42,029 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:16:42,202 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:16:42,208 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:16:42,209 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 10:16:42,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:16:42 BoogieIcfgContainer [2022-10-17 10:16:42,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:16:42,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:16:42,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:16:42,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:16:42,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:16:41" (1/3) ... [2022-10-17 10:16:42,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd82ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:16:42, skipping insertion in model container [2022-10-17 10:16:42,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:41" (2/3) ... [2022-10-17 10:16:42,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd82ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:16:42, skipping insertion in model container [2022-10-17 10:16:42,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:16:42" (3/3) ... [2022-10-17 10:16:42,222 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2022-10-17 10:16:42,259 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:16:42,260 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:16:42,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:16:42,331 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;@76b35c90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:16:42,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:16:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 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) [2022-10-17 10:16:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:16:42,345 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:42,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:42,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2044605464, now seen corresponding path program 1 times [2022-10-17 10:16:42,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:42,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377212656] [2022-10-17 10:16:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:42,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:16:42,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:42,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377212656] [2022-10-17 10:16:42,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377212656] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:42,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:16:42,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:16:42,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518257064] [2022-10-17 10:16:42,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:42,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:42,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:42,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:42,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:16:42,818 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:42,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:42,914 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2022-10-17 10:16:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:16:42,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 10:16:42,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:42,939 INFO L225 Difference]: With dead ends: 42 [2022-10-17 10:16:42,939 INFO L226 Difference]: Without dead ends: 20 [2022-10-17 10:16:42,944 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 [2022-10-17 10:16:42,951 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:42,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:16:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-10-17 10:16:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-10-17 10:16:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-10-17 10:16:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-10-17 10:16:43,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-10-17 10:16:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:43,004 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-10-17 10:16:43,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-10-17 10:16:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 10:16:43,006 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:43,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:43,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:16:43,008 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:43,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:43,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1280243605, now seen corresponding path program 1 times [2022-10-17 10:16:43,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:43,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876506469] [2022-10-17 10:16:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:43,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:16:43,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:43,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876506469] [2022-10-17 10:16:43,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876506469] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:43,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:16:43,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:16:43,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552574052] [2022-10-17 10:16:43,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:43,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:16:43,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:43,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:16:43,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:16:43,299 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-10-17 10:16:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:43,375 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-10-17 10:16:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:16:43,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2022-10-17 10:16:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:43,379 INFO L225 Difference]: With dead ends: 38 [2022-10-17 10:16:43,381 INFO L226 Difference]: Without dead ends: 26 [2022-10-17 10:16:43,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:16:43,386 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:43,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:16:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-10-17 10:16:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2022-10-17 10:16:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-10-17 10:16:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-10-17 10:16:43,404 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2022-10-17 10:16:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:43,406 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-10-17 10:16:43,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-10-17 10:16:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-10-17 10:16:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 10:16:43,412 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:43,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:43,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:16:43,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:43,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1442235305, now seen corresponding path program 1 times [2022-10-17 10:16:43,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:43,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771570349] [2022-10-17 10:16:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:16:43,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:43,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771570349] [2022-10-17 10:16:43,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771570349] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:43,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:16:43,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:16:43,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110724717] [2022-10-17 10:16:43,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:43,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:43,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:43,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:43,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:16:43,540 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:43,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:43,554 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-10-17 10:16:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:16:43,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-17 10:16:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:43,555 INFO L225 Difference]: With dead ends: 34 [2022-10-17 10:16:43,555 INFO L226 Difference]: Without dead ends: 21 [2022-10-17 10:16:43,556 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 [2022-10-17 10:16:43,558 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:43,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:16:43,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-10-17 10:16:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-10-17 10:16:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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) [2022-10-17 10:16:43,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-10-17 10:16:43,564 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2022-10-17 10:16:43,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:43,565 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-10-17 10:16:43,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:43,565 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-10-17 10:16:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:16:43,566 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:43,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:43,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:16:43,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:43,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2093661559, now seen corresponding path program 1 times [2022-10-17 10:16:43,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:43,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686651249] [2022-10-17 10:16:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:43,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:16:43,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:43,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686651249] [2022-10-17 10:16:43,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686651249] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:16:43,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38829988] [2022-10-17 10:16:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:43,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:43,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:43,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:16:43,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:16:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:43,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:16:43,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:16:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:16:44,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:16:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:16:44,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38829988] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:16:44,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:16:44,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-10-17 10:16:44,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985152489] [2022-10-17 10:16:44,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:16:44,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:16:44,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:44,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:16:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:16:44,080 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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) [2022-10-17 10:16:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:44,372 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2022-10-17 10:16:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:16:44,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 16 [2022-10-17 10:16:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:44,374 INFO L225 Difference]: With dead ends: 84 [2022-10-17 10:16:44,374 INFO L226 Difference]: Without dead ends: 68 [2022-10-17 10:16:44,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:16:44,377 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:44,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 86 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:16:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-17 10:16:44,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 37. [2022-10-17 10:16:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 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) [2022-10-17 10:16:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-10-17 10:16:44,404 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 16 [2022-10-17 10:16:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:44,405 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-10-17 10:16:44,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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) [2022-10-17 10:16:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-10-17 10:16:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:16:44,406 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:44,407 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:44,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:16:44,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:44,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:44,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1674724175, now seen corresponding path program 1 times [2022-10-17 10:16:44,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:44,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734776837] [2022-10-17 10:16:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:44,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:16:44,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:44,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734776837] [2022-10-17 10:16:44,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734776837] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:16:44,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447473212] [2022-10-17 10:16:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:44,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:44,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:44,910 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:16:44,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:16:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:44,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:16:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:16:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:16:45,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:16:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:16:45,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447473212] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:16:45,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:16:45,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-10-17 10:16:45,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250126615] [2022-10-17 10:16:45,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:16:45,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 10:16:45,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:45,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 10:16:45,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:16:45,219 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:45,340 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2022-10-17 10:16:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:16:45,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-17 10:16:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:45,343 INFO L225 Difference]: With dead ends: 83 [2022-10-17 10:16:45,344 INFO L226 Difference]: Without dead ends: 57 [2022-10-17 10:16:45,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:16:45,352 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:45,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 80 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:16:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-17 10:16:45,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2022-10-17 10:16:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 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) [2022-10-17 10:16:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-10-17 10:16:45,382 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 25 [2022-10-17 10:16:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:45,383 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-10-17 10:16:45,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-10-17 10:16:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 10:16:45,387 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:45,387 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:45,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:16:45,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:45,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash 674415525, now seen corresponding path program 2 times [2022-10-17 10:16:45,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:45,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34499413] [2022-10-17 10:16:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:45,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:16:46,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34499413] [2022-10-17 10:16:46,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34499413] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:16:46,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819498917] [2022-10-17 10:16:46,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:16:46,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:46,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:46,104 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:16:46,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:16:46,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:16:46,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:16:46,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:16:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:16:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:16:46,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:16:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:16:46,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819498917] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:16:46,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:16:46,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2022-10-17 10:16:46,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017604741] [2022-10-17 10:16:46,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:16:46,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-10-17 10:16:46,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:46,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-10-17 10:16:46,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2022-10-17 10:16:46,886 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:47,103 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2022-10-17 10:16:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-17 10:16:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-17 10:16:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:47,105 INFO L225 Difference]: With dead ends: 107 [2022-10-17 10:16:47,105 INFO L226 Difference]: Without dead ends: 81 [2022-10-17 10:16:47,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2022-10-17 10:16:47,108 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:47,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 64 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:16:47,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-10-17 10:16:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2022-10-17 10:16:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 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) [2022-10-17 10:16:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-10-17 10:16:47,123 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 37 [2022-10-17 10:16:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:47,123 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-10-17 10:16:47,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-10-17 10:16:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-17 10:16:47,126 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:47,126 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:47,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:16:47,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:16:47,341 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:47,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:47,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1755146125, now seen corresponding path program 3 times [2022-10-17 10:16:47,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:47,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746707310] [2022-10-17 10:16:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:47,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:16:48,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:48,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746707310] [2022-10-17 10:16:48,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746707310] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:16:48,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737227790] [2022-10-17 10:16:48,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:16:48,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:48,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:48,366 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:16:48,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:16:48,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 10:16:48,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:16:48,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:16:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:16:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-10-17 10:16:48,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:16:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-10-17 10:16:48,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737227790] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:16:48,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:16:48,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 33 [2022-10-17 10:16:48,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366011775] [2022-10-17 10:16:48,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:16:48,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-17 10:16:48,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:48,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-17 10:16:48,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=632, Unknown=0, NotChecked=0, Total=1056 [2022-10-17 10:16:48,874 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 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) [2022-10-17 10:16:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:51,533 INFO L93 Difference]: Finished difference Result 317 states and 378 transitions. [2022-10-17 10:16:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-10-17 10:16:51,534 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 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 61 [2022-10-17 10:16:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:51,537 INFO L225 Difference]: With dead ends: 317 [2022-10-17 10:16:51,537 INFO L226 Difference]: Without dead ends: 291 [2022-10-17 10:16:51,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3510, Invalid=7410, Unknown=0, NotChecked=0, Total=10920 [2022-10-17 10:16:51,545 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 597 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:51,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 100 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:16:51,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-10-17 10:16:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 196. [2022-10-17 10:16:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 195 states have internal predecessors, (224), 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) [2022-10-17 10:16:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 224 transitions. [2022-10-17 10:16:51,593 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 224 transitions. Word has length 61 [2022-10-17 10:16:51,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:51,594 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 224 transitions. [2022-10-17 10:16:51,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 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) [2022-10-17 10:16:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 224 transitions. [2022-10-17 10:16:51,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-10-17 10:16:51,597 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:51,597 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:51,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:16:51,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:51,812 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:51,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:51,813 INFO L85 PathProgramCache]: Analyzing trace with hash 842992325, now seen corresponding path program 1 times [2022-10-17 10:16:51,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:51,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286995232] [2022-10-17 10:16:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:51,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:16:52,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:52,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286995232] [2022-10-17 10:16:52,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286995232] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:16:52,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347168010] [2022-10-17 10:16:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:52,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:52,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:52,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:16:52,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:16:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:52,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-17 10:16:52,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:16:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:16:53,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:16:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:16:54,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347168010] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:16:54,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:16:54,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 80 [2022-10-17 10:16:54,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730622208] [2022-10-17 10:16:54,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:16:54,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-10-17 10:16:54,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:54,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-10-17 10:16:54,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2860, Invalid=3460, Unknown=0, NotChecked=0, Total=6320 [2022-10-17 10:16:54,968 INFO L87 Difference]: Start difference. First operand 196 states and 224 transitions. Second operand has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 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) [2022-10-17 10:16:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:55,286 INFO L93 Difference]: Finished difference Result 402 states and 485 transitions. [2022-10-17 10:16:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-10-17 10:16:55,286 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 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 72 [2022-10-17 10:16:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:55,289 INFO L225 Difference]: With dead ends: 402 [2022-10-17 10:16:55,289 INFO L226 Difference]: Without dead ends: 259 [2022-10-17 10:16:55,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2860, Invalid=3460, Unknown=0, NotChecked=0, Total=6320 [2022-10-17 10:16:55,294 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:55,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 86 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:16:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-10-17 10:16:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 250. [2022-10-17 10:16:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1164658634538152) internal successors, (278), 249 states have internal predecessors, (278), 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) [2022-10-17 10:16:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 278 transitions. [2022-10-17 10:16:55,337 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 278 transitions. Word has length 72 [2022-10-17 10:16:55,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:55,338 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 278 transitions. [2022-10-17 10:16:55,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 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) [2022-10-17 10:16:55,339 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 278 transitions. [2022-10-17 10:16:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-10-17 10:16:55,341 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:55,341 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:55,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:16:55,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:55,565 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:55,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:55,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1201235067, now seen corresponding path program 2 times [2022-10-17 10:16:55,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:55,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387621001] [2022-10-17 10:16:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:55,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:16:59,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:59,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387621001] [2022-10-17 10:16:59,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387621001] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:16:59,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626840198] [2022-10-17 10:16:59,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:16:59,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:59,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:59,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:16:59,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:16:59,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:16:59,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:16:59,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 55 conjunts are in the unsatisfiable core [2022-10-17 10:16:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:17:01,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:17:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:17:05,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626840198] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:17:05,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:17:05,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 161 [2022-10-17 10:17:05,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832670003] [2022-10-17 10:17:05,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:17:05,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-10-17 10:17:05,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:05,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-10-17 10:17:05,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11554, Invalid=14206, Unknown=0, NotChecked=0, Total=25760 [2022-10-17 10:17:05,164 INFO L87 Difference]: Start difference. First operand 250 states and 278 transitions. Second operand has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 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) [2022-10-17 10:17:05,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:17:05,802 INFO L93 Difference]: Finished difference Result 510 states and 620 transitions. [2022-10-17 10:17:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-10-17 10:17:05,803 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 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 126 [2022-10-17 10:17:05,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:17:05,806 INFO L225 Difference]: With dead ends: 510 [2022-10-17 10:17:05,807 INFO L226 Difference]: Without dead ends: 367 [2022-10-17 10:17:05,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11075 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=11554, Invalid=14206, Unknown=0, NotChecked=0, Total=25760 [2022-10-17 10:17:05,813 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 222 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:17:05,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 68 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:17:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-10-17 10:17:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 358. [2022-10-17 10:17:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.0812324929971988) internal successors, (386), 357 states have internal predecessors, (386), 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) [2022-10-17 10:17:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 386 transitions. [2022-10-17 10:17:05,851 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 386 transitions. Word has length 126 [2022-10-17 10:17:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:17:05,852 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 386 transitions. [2022-10-17 10:17:05,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 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) [2022-10-17 10:17:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 386 transitions. [2022-10-17 10:17:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-10-17 10:17:05,856 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:17:05,857 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:17:05,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:17:06,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d1bb149-4042-418c-8da7-0a35ce22f517/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-10-17 10:17:06,076 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:17:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1368520089, now seen corresponding path program 3 times [2022-10-17 10:17:06,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:06,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014669926] [2022-10-17 10:17:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:06,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat