./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rew.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rew.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS --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 a4dbd52ad78119a422ea606f98f820bbe5495fb5a7cf8886c665da2d1f9b569e --- 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-4e7fbc6 [2022-11-23 03:03:37,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:03:37,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:03:37,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:03:37,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:03:37,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:03:37,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:03:37,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:03:37,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:03:37,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:03:37,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:03:37,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:03:37,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:03:37,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:03:37,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:03:37,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:03:37,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:03:37,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:03:37,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:03:37,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:03:37,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:03:37,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:03:37,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:03:37,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:03:37,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:03:37,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:03:37,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:03:37,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:03:37,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:03:37,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:03:37,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:03:38,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:03:38,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:03:38,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:03:38,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:03:38,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:03:38,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:03:38,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:03:38,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:03:38,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:03:38,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:03:38,010 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:03:38,036 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:03:38,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:03:38,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:03:38,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:03:38,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:03:38,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:03:38,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:03:38,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:03:38,040 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:03:38,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:03:38,040 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:03:38,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:03:38,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:03:38,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:03:38,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:03:38,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:03:38,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:03:38,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:03:38,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:03:38,043 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:03:38,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:03:38,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:03:38,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:03:38,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:03:38,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:03:38,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:03:38,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:03:38,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:03:38,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:03:38,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:03:38,046 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:03:38,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:03:38,046 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:03:38,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:03:38,047 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4dbd52ad78119a422ea606f98f820bbe5495fb5a7cf8886c665da2d1f9b569e [2022-11-23 03:03:38,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:03:38,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:03:38,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:03:38,411 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:03:38,412 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:03:38,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/array-tiling/rew.c [2022-11-23 03:03:41,545 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:03:41,816 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:03:41,817 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/sv-benchmarks/c/array-tiling/rew.c [2022-11-23 03:03:41,824 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/data/632e8408f/e4a6f20589f94b7ea69962529efa0f7f/FLAG0ba7a444e [2022-11-23 03:03:41,842 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/data/632e8408f/e4a6f20589f94b7ea69962529efa0f7f [2022-11-23 03:03:41,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:03:41,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:03:41,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:03:41,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:03:41,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:03:41,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:41" (1/1) ... [2022-11-23 03:03:41,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bbff4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:41, skipping insertion in model container [2022-11-23 03:03:41,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:41" (1/1) ... [2022-11-23 03:03:41,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:03:41,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:03:42,038 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/sv-benchmarks/c/array-tiling/rew.c[394,407] [2022-11-23 03:03:42,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:03:42,070 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:03:42,083 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/sv-benchmarks/c/array-tiling/rew.c[394,407] [2022-11-23 03:03:42,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:03:42,103 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:03:42,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42 WrapperNode [2022-11-23 03:03:42,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:03:42,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:03:42,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:03:42,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:03:42,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (1/1) ... [2022-11-23 03:03:42,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (1/1) ... [2022-11-23 03:03:42,157 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-11-23 03:03:42,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:03:42,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:03:42,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:03:42,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:03:42,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (1/1) ... [2022-11-23 03:03:42,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (1/1) ... [2022-11-23 03:03:42,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (1/1) ... [2022-11-23 03:03:42,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (1/1) ... [2022-11-23 03:03:42,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (1/1) ... [2022-11-23 03:03:42,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (1/1) ... [2022-11-23 03:03:42,197 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (1/1) ... [2022-11-23 03:03:42,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (1/1) ... [2022-11-23 03:03:42,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:03:42,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:03:42,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:03:42,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:03:42,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (1/1) ... [2022-11-23 03:03:42,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:03:42,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:42,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:03:42,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:03:42,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:03:42,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:03:42,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:03:42,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:03:42,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:03:42,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:03:42,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:03:42,350 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:03:42,352 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:03:42,500 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:03:42,507 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:03:42,507 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 03:03:42,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:42 BoogieIcfgContainer [2022-11-23 03:03:42,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:03:42,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:03:42,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:03:42,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:03:42,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:03:41" (1/3) ... [2022-11-23 03:03:42,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646cdc2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:42, skipping insertion in model container [2022-11-23 03:03:42,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:42" (2/3) ... [2022-11-23 03:03:42,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646cdc2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:42, skipping insertion in model container [2022-11-23 03:03:42,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:42" (3/3) ... [2022-11-23 03:03:42,521 INFO L112 eAbstractionObserver]: Analyzing ICFG rew.c [2022-11-23 03:03:42,559 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:03:42,559 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:03:42,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:03:42,678 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;@1ef131d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:03:42,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 03:03:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 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) [2022-11-23 03:03:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 03:03:42,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:03:42,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:42,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:03:42,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:42,703 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-11-23 03:03:42,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:42,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020068519] [2022-11-23 03:03:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:42,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:42,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:42,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020068519] [2022-11-23 03:03:42,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020068519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:03:42,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:03:42,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:03:42,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8100970] [2022-11-23 03:03:42,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:03:42,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 03:03:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:43,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 03:03:43,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:03:43,025 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:03:43,047 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-11-23 03:03:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 03:03:43,050 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 03:03:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:03:43,062 INFO L225 Difference]: With dead ends: 29 [2022-11-23 03:03:43,062 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 03:03:43,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:03:43,071 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:03:43,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:03:43,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 03:03:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 03:03:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-23 03:03:43,117 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-23 03:03:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:03:43,118 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-23 03:03:43,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-23 03:03:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 03:03:43,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:03:43,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:43,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:03:43,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:03:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:43,122 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-11-23 03:03:43,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:43,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313633514] [2022-11-23 03:03:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:43,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:43,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:43,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313633514] [2022-11-23 03:03:43,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313633514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:03:43,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:03:43,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:03:43,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443082425] [2022-11-23 03:03:43,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:03:43,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:03:43,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:43,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:03:43,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:03:43,343 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:03:43,400 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-11-23 03:03:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:03:43,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 03:03:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:03:43,403 INFO L225 Difference]: With dead ends: 29 [2022-11-23 03:03:43,403 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 03:03:43,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:03:43,409 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:03:43,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:03:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 03:03:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-11-23 03:03:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-23 03:03:43,420 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-23 03:03:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:03:43,421 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-23 03:03:43,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:43,424 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-23 03:03:43,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 03:03:43,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:03:43,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:43,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:03:43,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:03:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:43,433 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-11-23 03:03:43,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:43,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807596493] [2022-11-23 03:03:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:43,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:43,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807596493] [2022-11-23 03:03:43,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807596493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:03:43,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483468833] [2022-11-23 03:03:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:43,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:43,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:43,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:03:43,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:03:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:43,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:03:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:03:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:43,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:03:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:43,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483468833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:03:43,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:03:43,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 03:03:43,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559937232] [2022-11-23 03:03:43,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:03:43,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 03:03:43,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:43,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 03:03:43,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:03:43,885 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:03:43,989 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-11-23 03:03:43,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:03:43,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 [2022-11-23 03:03:43,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:03:43,993 INFO L225 Difference]: With dead ends: 34 [2022-11-23 03:03:43,993 INFO L226 Difference]: Without dead ends: 27 [2022-11-23 03:03:43,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:03:43,998 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:03:43,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:03:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-23 03:03:44,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-11-23 03:03:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-23 03:03:44,011 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-11-23 03:03:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:03:44,012 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-23 03:03:44,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-23 03:03:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 03:03:44,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:03:44,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:44,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:03:44,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:44,221 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:03:44,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:44,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-11-23 03:03:44,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:44,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617208199] [2022-11-23 03:03:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:44,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:44,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:44,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617208199] [2022-11-23 03:03:44,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617208199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:03:44,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9517920] [2022-11-23 03:03:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:44,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:44,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:44,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:03:44,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:03:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:45,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 03:03:45,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:03:45,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 03:03:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:03:45,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 03:03:45,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:03:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:45,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:03:49,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-23 03:03:49,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 138 [2022-11-23 03:03:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:49,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9517920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:03:49,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:03:49,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2022-11-23 03:03:49,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618833388] [2022-11-23 03:03:49,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:03:49,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 03:03:49,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:49,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 03:03:49,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2022-11-23 03:03:49,835 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2022-11-23 03:03:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:03:50,144 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-11-23 03:03:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:03:50,146 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 03:03:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:03:50,147 INFO L225 Difference]: With dead ends: 28 [2022-11-23 03:03:50,147 INFO L226 Difference]: Without dead ends: 26 [2022-11-23 03:03:50,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=114, Invalid=347, Unknown=1, NotChecked=0, Total=462 [2022-11-23 03:03:50,148 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:03:50,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 41 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:03:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-23 03:03:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-23 03:03:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-23 03:03:50,156 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-11-23 03:03:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:03:50,156 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-23 03:03:50,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2022-11-23 03:03:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-23 03:03:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 03:03:50,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:03:50,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:50,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:03:50,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:50,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:03:50,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-11-23 03:03:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:50,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651249433] [2022-11-23 03:03:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:50,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:50,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:50,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651249433] [2022-11-23 03:03:50,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651249433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:03:50,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587774862] [2022-11-23 03:03:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:50,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:50,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:50,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:03:50,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:03:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:50,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 03:03:50,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:03:51,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:03:51,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:03:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:51,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:03:51,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 03:03:51,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 03:03:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:51,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587774862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:03:51,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:03:51,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-23 03:03:51,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742462382] [2022-11-23 03:03:51,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:03:51,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 03:03:51,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:51,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 03:03:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-23 03:03:51,383 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 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) [2022-11-23 03:03:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:03:51,718 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-11-23 03:03:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:03:51,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 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) Word has length 20 [2022-11-23 03:03:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:03:51,719 INFO L225 Difference]: With dead ends: 51 [2022-11-23 03:03:51,719 INFO L226 Difference]: Without dead ends: 49 [2022-11-23 03:03:51,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-11-23 03:03:51,720 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:03:51,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 94 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:03:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-23 03:03:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2022-11-23 03:03:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-23 03:03:51,730 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2022-11-23 03:03:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:03:51,730 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-23 03:03:51,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 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) [2022-11-23 03:03:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-23 03:03:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 03:03:51,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:03:51,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:51,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 03:03:51,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:51,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:03:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash -255872648, now seen corresponding path program 2 times [2022-11-23 03:03:51,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:51,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847515529] [2022-11-23 03:03:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:51,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:52,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:52,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847515529] [2022-11-23 03:03:52,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847515529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:03:52,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847408992] [2022-11-23 03:03:52,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:03:52,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:52,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:52,368 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:03:52,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:03:52,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:03:52,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:03:52,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 03:03:52,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:03:52,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 03:03:52,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:03:52,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 03:03:52,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:03:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:52,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:03:53,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 03:03:53,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-23 03:03:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:53,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847408992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:03:53,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:03:53,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 24 [2022-11-23 03:03:53,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480198834] [2022-11-23 03:03:53,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:03:53,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 03:03:53,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 03:03:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-11-23 03:03:53,303 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:03:53,824 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-11-23 03:03:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 03:03:53,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 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 24 [2022-11-23 03:03:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:03:53,826 INFO L225 Difference]: With dead ends: 46 [2022-11-23 03:03:53,826 INFO L226 Difference]: Without dead ends: 44 [2022-11-23 03:03:53,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2022-11-23 03:03:53,827 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:03:53,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 79 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:03:53,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-23 03:03:53,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 25. [2022-11-23 03:03:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-11-23 03:03:53,834 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 24 [2022-11-23 03:03:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:03:53,851 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-11-23 03:03:53,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-11-23 03:03:53,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 03:03:53,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:03:53,852 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:53,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:03:54,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 03:03:54,053 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:03:54,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:54,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 3 times [2022-11-23 03:03:54,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:54,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937553310] [2022-11-23 03:03:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:54,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:54,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:54,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937553310] [2022-11-23 03:03:54,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937553310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:03:54,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474414377] [2022-11-23 03:03:54,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:03:54,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:54,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:54,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:03:54,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:03:54,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 03:03:54,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:03:54,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 03:03:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:03:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:54,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:03:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:54,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474414377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:03:54,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:03:54,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-23 03:03:54,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099383250] [2022-11-23 03:03:54,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:03:54,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:03:54,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:03:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:03:54,417 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:54,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:03:54,559 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-11-23 03:03:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:03:54,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 03:03:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:03:54,566 INFO L225 Difference]: With dead ends: 66 [2022-11-23 03:03:54,566 INFO L226 Difference]: Without dead ends: 33 [2022-11-23 03:03:54,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:03:54,568 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:03:54,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 43 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:03:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-23 03:03:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-11-23 03:03:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-23 03:03:54,586 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2022-11-23 03:03:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:03:54,587 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-23 03:03:54,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:03:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-23 03:03:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 03:03:54,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:03:54,588 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:54,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:03:54,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 03:03:54,791 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:03:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 4 times [2022-11-23 03:03:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:54,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775762563] [2022-11-23 03:03:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:54,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:55,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:55,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775762563] [2022-11-23 03:03:55,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775762563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:03:55,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118429117] [2022-11-23 03:03:55,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:03:55,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:55,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:55,235 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:03:55,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230282d5-d05d-4645-8b8c-4e575bd52afb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:03:55,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:03:55,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:03:55,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 03:03:55,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:03:55,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 03:03:55,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 03:03:55,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-23 03:03:55,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-23 03:03:56,157 INFO L321 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2022-11-23 03:03:56,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 03:03:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:56,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:04:15,952 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_126 Int) (|v_ULTIMATE.start_main_~i~0#1_57| Int) (v_ArrVal_129 Int) (v_ArrVal_128 Int)) (or (let ((.cse0 (let ((.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse2 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse2 v_ArrVal_126) (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_128) .cse2 v_ArrVal_129)))) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_57| 4))) (< (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (+ (select .cse0 (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1))) (not (<= |c_ULTIMATE.start_main_~val2~0#1| v_ArrVal_129)) (not (<= 0 |v_ULTIMATE.start_main_~i~0#1_57|)) (< |c_ULTIMATE.start_main_~i~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_57| 1)))) is different from false [2022-11-23 03:04:28,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2022-11-23 03:04:28,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:04:28,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186370 treesize of output 179714 [2022-11-23 03:04:36,333 WARN L233 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 849 DAG size of output: 802 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)