./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de62.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de62.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8 --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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --- 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-e04fb08 [2022-11-16 11:07:58,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:07:58,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:07:58,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:07:58,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:07:58,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:07:58,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:07:58,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:07:58,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:07:58,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:07:58,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:07:58,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:07:58,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:07:58,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:07:58,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:07:58,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:07:58,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:07:58,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:07:58,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:07:58,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:07:58,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:07:58,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:07:58,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:07:58,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:07:58,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:07:58,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:07:58,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:07:58,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:07:58,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:07:58,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:07:58,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:07:58,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:07:58,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:07:58,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:07:58,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:07:58,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:07:58,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:07:58,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:07:58,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:07:58,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:07:58,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:07:58,226 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:07:58,289 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:07:58,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:07:58,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:07:58,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:07:58,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:07:58,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:07:58,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:07:58,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:07:58,292 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:07:58,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:07:58,293 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:07:58,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:07:58,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:07:58,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:07:58,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:07:58,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:07:58,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:07:58,296 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:07:58,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:07:58,296 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:07:58,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:07:58,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:07:58,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:07:58,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:07:58,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:07:58,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:07:58,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:07:58,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:07:58,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:07:58,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:07:58,301 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:07:58,302 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:07:58,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:07:58,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2022-11-16 11:07:58,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:07:58,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:07:58,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:07:58,743 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:07:58,744 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:07:58,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/loops-crafted-1/in-de62.c [2022-11-16 11:07:58,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/data/1c78880a0/05895a6aa8ac4f49872ac44652bda2ac/FLAG4f2cc13a4 [2022-11-16 11:07:59,456 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:07:59,457 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/sv-benchmarks/c/loops-crafted-1/in-de62.c [2022-11-16 11:07:59,465 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/data/1c78880a0/05895a6aa8ac4f49872ac44652bda2ac/FLAG4f2cc13a4 [2022-11-16 11:07:59,793 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/data/1c78880a0/05895a6aa8ac4f49872ac44652bda2ac [2022-11-16 11:07:59,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:07:59,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:07:59,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:07:59,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:07:59,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:07:59,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:07:59" (1/1) ... [2022-11-16 11:07:59,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a6f777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:59, skipping insertion in model container [2022-11-16 11:07:59,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:07:59" (1/1) ... [2022-11-16 11:07:59,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:07:59,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:08:00,097 WARN L229 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_20156512-9b98-4abb-adb4-dd38a15a4ac5/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2022-11-16 11:08:00,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:08:00,125 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:08:00,140 WARN L229 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_20156512-9b98-4abb-adb4-dd38a15a4ac5/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2022-11-16 11:08:00,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:08:00,163 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:08:00,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00 WrapperNode [2022-11-16 11:08:00,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:08:00,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:08:00,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:08:00,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:08:00,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (1/1) ... [2022-11-16 11:08:00,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (1/1) ... [2022-11-16 11:08:00,225 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-11-16 11:08:00,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:08:00,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:08:00,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:08:00,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:08:00,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (1/1) ... [2022-11-16 11:08:00,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (1/1) ... [2022-11-16 11:08:00,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (1/1) ... [2022-11-16 11:08:00,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (1/1) ... [2022-11-16 11:08:00,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (1/1) ... [2022-11-16 11:08:00,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (1/1) ... [2022-11-16 11:08:00,264 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (1/1) ... [2022-11-16 11:08:00,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (1/1) ... [2022-11-16 11:08:00,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:08:00,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:08:00,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:08:00,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:08:00,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (1/1) ... [2022-11-16 11:08:00,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:08:00,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:00,319 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:08:00,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:08:00,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:08:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:08:00,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:08:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:08:00,472 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:08:00,476 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:08:00,696 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:08:00,703 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:08:00,704 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 11:08:00,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:08:00 BoogieIcfgContainer [2022-11-16 11:08:00,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:08:00,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:08:00,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:08:00,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:08:00,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:07:59" (1/3) ... [2022-11-16 11:08:00,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f3201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:08:00, skipping insertion in model container [2022-11-16 11:08:00,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:00" (2/3) ... [2022-11-16 11:08:00,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f3201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:08:00, skipping insertion in model container [2022-11-16 11:08:00,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:08:00" (3/3) ... [2022-11-16 11:08:00,725 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2022-11-16 11:08:00,751 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:08:00,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:08:00,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:08:00,821 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;@7426801f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:08:00,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:08:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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) [2022-11-16 11:08:00,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:08:00,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:00,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:00,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:00,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2022-11-16 11:08:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:00,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627664917] [2022-11-16 11:08:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:00,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:01,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:01,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627664917] [2022-11-16 11:08:01,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627664917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:01,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:01,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:08:01,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364267485] [2022-11-16 11:08:01,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:01,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:08:01,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:08:01,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:08:01,177 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:01,200 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2022-11-16 11:08:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:08:01,203 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:08:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:01,214 INFO L225 Difference]: With dead ends: 31 [2022-11-16 11:08:01,214 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 11:08:01,219 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 [2022-11-16 11:08:01,224 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2022-11-16 11:08:01,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:08:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 11:08:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-16 11:08:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2022-11-16 11:08:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2022-11-16 11:08:01,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2022-11-16 11:08:01,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:01,279 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-11-16 11:08:01,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:01,281 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2022-11-16 11:08:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:08:01,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:01,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:01,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:08:01,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2022-11-16 11:08:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:01,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376778892] [2022-11-16 11:08:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:01,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:01,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:01,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376778892] [2022-11-16 11:08:01,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376778892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:01,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:01,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:08:01,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19560552] [2022-11-16 11:08:01,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:01,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:08:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:01,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:08:01,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:08:01,663 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:01,734 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2022-11-16 11:08:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:08:01,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:08:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:01,737 INFO L225 Difference]: With dead ends: 27 [2022-11-16 11:08:01,737 INFO L226 Difference]: Without dead ends: 18 [2022-11-16 11:08:01,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:08:01,739 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:01,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:08:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-16 11:08:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-16 11:08:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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) [2022-11-16 11:08:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2022-11-16 11:08:01,753 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 12 [2022-11-16 11:08:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:01,754 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2022-11-16 11:08:01,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2022-11-16 11:08:01,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:08:01,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:01,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:01,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:08:01,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:01,758 INFO L85 PathProgramCache]: Analyzing trace with hash 415981709, now seen corresponding path program 1 times [2022-11-16 11:08:01,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:01,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102876990] [2022-11-16 11:08:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:01,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:01,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:01,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102876990] [2022-11-16 11:08:01,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102876990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:01,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:01,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:08:01,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661418715] [2022-11-16 11:08:01,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:01,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:08:01,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:01,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:08:01,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:08:01,823 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:01,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:01,874 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2022-11-16 11:08:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:08:01,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:08:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:01,876 INFO L225 Difference]: With dead ends: 41 [2022-11-16 11:08:01,876 INFO L226 Difference]: Without dead ends: 28 [2022-11-16 11:08:01,877 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 [2022-11-16 11:08:01,879 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:01,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:08:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-16 11:08:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-16 11:08:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-11-16 11:08:01,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 41 transitions. [2022-11-16 11:08:01,899 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 41 transitions. Word has length 13 [2022-11-16 11:08:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:01,899 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 41 transitions. [2022-11-16 11:08:01,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2022-11-16 11:08:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:08:01,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:01,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:01,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:08:01,902 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:01,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash 461234238, now seen corresponding path program 1 times [2022-11-16 11:08:01,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:01,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58184892] [2022-11-16 11:08:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:01,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:01,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:01,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58184892] [2022-11-16 11:08:01,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58184892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:01,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:01,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:08:01,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452932361] [2022-11-16 11:08:01,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:01,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:08:01,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:01,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:08:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:08:01,995 INFO L87 Difference]: Start difference. First operand 28 states and 41 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:02,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:02,072 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-11-16 11:08:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:08:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:08:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:02,088 INFO L225 Difference]: With dead ends: 43 [2022-11-16 11:08:02,089 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 11:08:02,089 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 [2022-11-16 11:08:02,091 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:02,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:08:02,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 11:08:02,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-16 11:08:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-11-16 11:08:02,116 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 13 [2022-11-16 11:08:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:02,116 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-11-16 11:08:02,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-11-16 11:08:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:08:02,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:02,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:02,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:08:02,118 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:02,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1348188691, now seen corresponding path program 1 times [2022-11-16 11:08:02,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:02,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574223008] [2022-11-16 11:08:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:02,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:02,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574223008] [2022-11-16 11:08:02,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574223008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:02,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:02,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:08:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340679399] [2022-11-16 11:08:02,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:02,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:08:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:02,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:08:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:08:02,339 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:02,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:02,429 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-11-16 11:08:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:08:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:08:02,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:02,431 INFO L225 Difference]: With dead ends: 41 [2022-11-16 11:08:02,431 INFO L226 Difference]: Without dead ends: 28 [2022-11-16 11:08:02,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:08:02,434 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:02,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:08:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-16 11:08:02,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-16 11:08:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 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) [2022-11-16 11:08:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2022-11-16 11:08:02,450 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2022-11-16 11:08:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:02,450 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2022-11-16 11:08:02,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2022-11-16 11:08:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:08:02,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:02,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:02,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:08:02,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:02,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:02,454 INFO L85 PathProgramCache]: Analyzing trace with hash 121782348, now seen corresponding path program 1 times [2022-11-16 11:08:02,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:02,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952307538] [2022-11-16 11:08:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:02,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:02,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:02,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952307538] [2022-11-16 11:08:02,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952307538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:02,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815407325] [2022-11-16 11:08:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:02,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:02,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:02,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:02,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:08:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:02,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:08:02,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:02,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:02,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815407325] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:02,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:08:02,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2022-11-16 11:08:02,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112028097] [2022-11-16 11:08:02,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:02,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:08:02,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:02,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:08:02,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:08:02,953 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:03,066 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-11-16 11:08:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:08:03,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:08:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:03,071 INFO L225 Difference]: With dead ends: 35 [2022-11-16 11:08:03,071 INFO L226 Difference]: Without dead ends: 25 [2022-11-16 11:08:03,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:08:03,073 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:03,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:08:03,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-16 11:08:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-16 11:08:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 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) [2022-11-16 11:08:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-11-16 11:08:03,096 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 15 [2022-11-16 11:08:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:03,097 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-11-16 11:08:03,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-11-16 11:08:03,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:08:03,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:03,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:03,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:08:03,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:08:03,306 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:03,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1019268824, now seen corresponding path program 1 times [2022-11-16 11:08:03,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:03,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614290967] [2022-11-16 11:08:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:03,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:08:03,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:03,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614290967] [2022-11-16 11:08:03,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614290967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:03,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875675255] [2022-11-16 11:08:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:03,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:03,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:03,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:03,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:08:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:03,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:08:03,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:03,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:03,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875675255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:03,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:03,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2022-11-16 11:08:03,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682312154] [2022-11-16 11:08:03,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:03,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:08:03,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:03,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:08:03,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:08:03,685 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2022-11-16 11:08:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:03,970 INFO L93 Difference]: Finished difference Result 103 states and 154 transitions. [2022-11-16 11:08:03,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:08:03,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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 [2022-11-16 11:08:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:03,980 INFO L225 Difference]: With dead ends: 103 [2022-11-16 11:08:03,981 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 11:08:03,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:08:03,987 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:03,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 74 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:08:03,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 11:08:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 53. [2022-11-16 11:08:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2022-11-16 11:08:04,029 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 16 [2022-11-16 11:08:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:04,030 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2022-11-16 11:08:04,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2022-11-16 11:08:04,030 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2022-11-16 11:08:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:08:04,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:04,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:04,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:04,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:08:04,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:04,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:04,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1475655800, now seen corresponding path program 1 times [2022-11-16 11:08:04,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:04,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921347766] [2022-11-16 11:08:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:04,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:04,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:04,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921347766] [2022-11-16 11:08:04,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921347766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:04,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594368621] [2022-11-16 11:08:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:04,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:04,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:04,392 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:04,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:08:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:04,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:08:04,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:04,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:04,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594368621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:04,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:04,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-16 11:08:04,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310873859] [2022-11-16 11:08:04,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:04,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:08:04,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:04,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:08:04,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:08:04,654 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2022-11-16 11:08:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:04,775 INFO L93 Difference]: Finished difference Result 101 states and 144 transitions. [2022-11-16 11:08:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:08:04,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) Word has length 16 [2022-11-16 11:08:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:04,777 INFO L225 Difference]: With dead ends: 101 [2022-11-16 11:08:04,777 INFO L226 Difference]: Without dead ends: 94 [2022-11-16 11:08:04,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:08:04,783 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:04,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:08:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-16 11:08:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2022-11-16 11:08:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.5) internal successors, (96), 64 states have internal predecessors, (96), 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) [2022-11-16 11:08:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 96 transitions. [2022-11-16 11:08:04,831 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 96 transitions. Word has length 16 [2022-11-16 11:08:04,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:04,831 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 96 transitions. [2022-11-16 11:08:04,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2022-11-16 11:08:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 96 transitions. [2022-11-16 11:08:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:08:04,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:04,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:04,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:05,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:05,046 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:05,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2038983293, now seen corresponding path program 1 times [2022-11-16 11:08:05,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:05,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687702673] [2022-11-16 11:08:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:05,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:05,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687702673] [2022-11-16 11:08:05,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687702673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946391719] [2022-11-16 11:08:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:05,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:05,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:05,245 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:05,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:08:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:05,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:08:05,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:05,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:08:05,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946391719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:05,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:05,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-11-16 11:08:05,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174500809] [2022-11-16 11:08:05,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:05,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:08:05,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:05,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:08:05,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:08:05,645 INFO L87 Difference]: Start difference. First operand 65 states and 96 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2022-11-16 11:08:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:06,011 INFO L93 Difference]: Finished difference Result 141 states and 210 transitions. [2022-11-16 11:08:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:08:06,012 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) Word has length 17 [2022-11-16 11:08:06,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:06,013 INFO L225 Difference]: With dead ends: 141 [2022-11-16 11:08:06,014 INFO L226 Difference]: Without dead ends: 112 [2022-11-16 11:08:06,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:08:06,018 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:06,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 72 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:08:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-16 11:08:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2022-11-16 11:08:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 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) [2022-11-16 11:08:06,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2022-11-16 11:08:06,100 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 17 [2022-11-16 11:08:06,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:06,101 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2022-11-16 11:08:06,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2022-11-16 11:08:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2022-11-16 11:08:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:08:06,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:06,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:06,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:06,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:08:06,310 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:06,311 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2022-11-16 11:08:06,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:06,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479225078] [2022-11-16 11:08:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:06,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:06,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:06,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479225078] [2022-11-16 11:08:06,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479225078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:06,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284611743] [2022-11-16 11:08:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:06,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:06,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:06,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:06,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:08:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:06,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:08:06,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:08:06,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:08:06,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284611743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:06,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:06,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-16 11:08:06,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067619574] [2022-11-16 11:08:06,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:06,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:08:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:06,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:08:06,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:08:06,711 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:06,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:06,836 INFO L93 Difference]: Finished difference Result 143 states and 207 transitions. [2022-11-16 11:08:06,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:08:06,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:08:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:06,838 INFO L225 Difference]: With dead ends: 143 [2022-11-16 11:08:06,838 INFO L226 Difference]: Without dead ends: 95 [2022-11-16 11:08:06,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:08:06,840 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:06,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:08:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-16 11:08:06,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2022-11-16 11:08:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.472972972972973) internal successors, (109), 74 states have internal predecessors, (109), 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) [2022-11-16 11:08:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 109 transitions. [2022-11-16 11:08:06,893 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 109 transitions. Word has length 18 [2022-11-16 11:08:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:06,893 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 109 transitions. [2022-11-16 11:08:06,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 109 transitions. [2022-11-16 11:08:06,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:08:06,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:06,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:06,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:07,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:08:07,102 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:07,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:07,102 INFO L85 PathProgramCache]: Analyzing trace with hash 91906733, now seen corresponding path program 2 times [2022-11-16 11:08:07,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:07,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674224323] [2022-11-16 11:08:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:07,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:08:07,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674224323] [2022-11-16 11:08:07,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674224323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206430779] [2022-11-16 11:08:07,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:08:07,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:07,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:07,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:07,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:08:07,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:08:07,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:07,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:08:07,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:08:07,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:08:07,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206430779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:07,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:07,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-16 11:08:07,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755254960] [2022-11-16 11:08:07,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:07,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:08:07,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:08:07,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:08:07,492 INFO L87 Difference]: Start difference. First operand 75 states and 109 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2022-11-16 11:08:07,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:07,848 INFO L93 Difference]: Finished difference Result 138 states and 198 transitions. [2022-11-16 11:08:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:08:07,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 19 [2022-11-16 11:08:07,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:07,849 INFO L225 Difference]: With dead ends: 138 [2022-11-16 11:08:07,849 INFO L226 Difference]: Without dead ends: 94 [2022-11-16 11:08:07,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:08:07,851 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:07,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 73 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:08:07,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-16 11:08:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2022-11-16 11:08:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 69 states have internal predecessors, (103), 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) [2022-11-16 11:08:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 103 transitions. [2022-11-16 11:08:07,891 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 103 transitions. Word has length 19 [2022-11-16 11:08:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:07,891 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 103 transitions. [2022-11-16 11:08:07,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2022-11-16 11:08:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 103 transitions. [2022-11-16 11:08:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:08:07,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:07,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:07,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:08,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:08,111 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:08,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:08,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1779216382, now seen corresponding path program 2 times [2022-11-16 11:08:08,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:08,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114513525] [2022-11-16 11:08:08,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:08,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:08,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:08,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114513525] [2022-11-16 11:08:08,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114513525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:08,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100179466] [2022-11-16 11:08:08,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:08:08,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:08,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:08,314 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:08,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:08:08,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:08:08,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:08:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:08:08,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:08:08,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100179466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:08,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:08,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-11-16 11:08:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557382248] [2022-11-16 11:08:08,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:08,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:08:08,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:08,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:08:08,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:08:08,488 INFO L87 Difference]: Start difference. First operand 70 states and 103 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2022-11-16 11:08:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:09,450 INFO L93 Difference]: Finished difference Result 186 states and 255 transitions. [2022-11-16 11:08:09,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:08:09,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 19 [2022-11-16 11:08:09,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:09,452 INFO L225 Difference]: With dead ends: 186 [2022-11-16 11:08:09,452 INFO L226 Difference]: Without dead ends: 152 [2022-11-16 11:08:09,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:08:09,454 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:09,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 139 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:08:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-16 11:08:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 89. [2022-11-16 11:08:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3636363636363635) internal successors, (120), 88 states have internal predecessors, (120), 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) [2022-11-16 11:08:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2022-11-16 11:08:09,520 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 19 [2022-11-16 11:08:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:09,521 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2022-11-16 11:08:09,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2022-11-16 11:08:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2022-11-16 11:08:09,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:08:09,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:09,523 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:09,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:09,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:09,729 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:09,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2078405228, now seen corresponding path program 3 times [2022-11-16 11:08:09,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:09,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568976703] [2022-11-16 11:08:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:09,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:08:09,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:09,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568976703] [2022-11-16 11:08:09,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568976703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:09,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583621985] [2022-11-16 11:08:09,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:08:09,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:09,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:09,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:09,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:08:09,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:08:09,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:09,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:08:09,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:08:10,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:08:10,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583621985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:10,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:10,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2022-11-16 11:08:10,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868988785] [2022-11-16 11:08:10,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:10,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:08:10,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:08:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:08:10,231 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-11-16 11:08:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:11,237 INFO L93 Difference]: Finished difference Result 208 states and 292 transitions. [2022-11-16 11:08:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:08:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 21 [2022-11-16 11:08:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:11,239 INFO L225 Difference]: With dead ends: 208 [2022-11-16 11:08:11,239 INFO L226 Difference]: Without dead ends: 141 [2022-11-16 11:08:11,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:08:11,240 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 87 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:11,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 182 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:08:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-16 11:08:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2022-11-16 11:08:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 84 states have internal predecessors, (121), 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) [2022-11-16 11:08:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-11-16 11:08:11,293 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 21 [2022-11-16 11:08:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:11,293 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-11-16 11:08:11,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-11-16 11:08:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-11-16 11:08:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:08:11,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:11,295 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:11,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:11,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:08:11,502 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:11,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:11,503 INFO L85 PathProgramCache]: Analyzing trace with hash 856330056, now seen corresponding path program 3 times [2022-11-16 11:08:11,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:11,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766491429] [2022-11-16 11:08:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:11,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:11,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:11,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766491429] [2022-11-16 11:08:11,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766491429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:11,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956151267] [2022-11-16 11:08:11,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:08:11,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:11,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:11,851 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:11,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:08:11,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:08:11,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:11,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:08:11,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:12,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:08:12,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956151267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:12,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:12,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 9] total 23 [2022-11-16 11:08:12,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258220603] [2022-11-16 11:08:12,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:12,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:08:12,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:12,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:08:12,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:08:12,423 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:14,401 INFO L93 Difference]: Finished difference Result 183 states and 269 transitions. [2022-11-16 11:08:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 11:08:14,402 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 11:08:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:14,403 INFO L225 Difference]: With dead ends: 183 [2022-11-16 11:08:14,403 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 11:08:14,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:08:14,405 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 163 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:14,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 147 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:08:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 11:08:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2022-11-16 11:08:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3666666666666667) internal successors, (164), 120 states have internal predecessors, (164), 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) [2022-11-16 11:08:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 164 transitions. [2022-11-16 11:08:14,477 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 164 transitions. Word has length 22 [2022-11-16 11:08:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:14,477 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 164 transitions. [2022-11-16 11:08:14,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 164 transitions. [2022-11-16 11:08:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:08:14,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:14,479 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:14,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:14,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:14,686 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1531208008, now seen corresponding path program 4 times [2022-11-16 11:08:14,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:14,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492875809] [2022-11-16 11:08:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:14,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:14,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:14,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492875809] [2022-11-16 11:08:14,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492875809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:14,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118235612] [2022-11-16 11:08:14,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:08:14,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:14,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:14,978 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:15,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:08:15,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:08:15,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:15,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:08:15,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:08:15,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:08:15,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118235612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:15,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:15,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-11-16 11:08:15,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703537950] [2022-11-16 11:08:15,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:15,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:08:15,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:15,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:08:15,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:08:15,204 INFO L87 Difference]: Start difference. First operand 121 states and 164 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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) [2022-11-16 11:08:18,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:18,635 INFO L93 Difference]: Finished difference Result 421 states and 594 transitions. [2022-11-16 11:08:18,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-16 11:08:18,635 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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 22 [2022-11-16 11:08:18,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:18,637 INFO L225 Difference]: With dead ends: 421 [2022-11-16 11:08:18,637 INFO L226 Difference]: Without dead ends: 349 [2022-11-16 11:08:18,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=534, Invalid=5318, Unknown=0, NotChecked=0, Total=5852 [2022-11-16 11:08:18,643 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 208 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:18,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 355 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:08:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-16 11:08:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 168. [2022-11-16 11:08:18,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.3832335329341316) internal successors, (231), 167 states have internal predecessors, (231), 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) [2022-11-16 11:08:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 231 transitions. [2022-11-16 11:08:18,736 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 231 transitions. Word has length 22 [2022-11-16 11:08:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:18,737 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 231 transitions. [2022-11-16 11:08:18,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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) [2022-11-16 11:08:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 231 transitions. [2022-11-16 11:08:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 11:08:18,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:18,738 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:18,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:18,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:08:18,946 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:18,946 INFO L85 PathProgramCache]: Analyzing trace with hash -425830760, now seen corresponding path program 2 times [2022-11-16 11:08:18,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:18,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180461536] [2022-11-16 11:08:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:18,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:08:19,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:19,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180461536] [2022-11-16 11:08:19,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180461536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:19,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609856590] [2022-11-16 11:08:19,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:08:19,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:19,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:19,171 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:19,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:08:19,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:08:19,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:19,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:08:19,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:19,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:08:19,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609856590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:19,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:19,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 7] total 19 [2022-11-16 11:08:19,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682993132] [2022-11-16 11:08:19,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:19,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:08:19,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:19,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:08:19,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:08:19,628 INFO L87 Difference]: Start difference. First operand 168 states and 231 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2022-11-16 11:08:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:20,415 INFO L93 Difference]: Finished difference Result 378 states and 564 transitions. [2022-11-16 11:08:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:08:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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 [2022-11-16 11:08:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:20,418 INFO L225 Difference]: With dead ends: 378 [2022-11-16 11:08:20,418 INFO L226 Difference]: Without dead ends: 303 [2022-11-16 11:08:20,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:08:20,421 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 139 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:20,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 270 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:08:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-16 11:08:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 207. [2022-11-16 11:08:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3737864077669903) internal successors, (283), 206 states have internal predecessors, (283), 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) [2022-11-16 11:08:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 283 transitions. [2022-11-16 11:08:20,538 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 283 transitions. Word has length 24 [2022-11-16 11:08:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:20,539 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 283 transitions. [2022-11-16 11:08:20,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2022-11-16 11:08:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 283 transitions. [2022-11-16 11:08:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:08:20,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:20,540 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:20,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:20,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:08:20,747 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:20,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:20,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1713191597, now seen corresponding path program 4 times [2022-11-16 11:08:20,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:20,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664886909] [2022-11-16 11:08:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:20,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:08:20,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:20,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664886909] [2022-11-16 11:08:20,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664886909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:20,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81307772] [2022-11-16 11:08:20,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:08:20,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:20,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:20,971 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:20,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:08:21,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:08:21,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:21,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:08:21,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 11:08:21,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 11:08:21,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81307772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:21,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:21,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-11-16 11:08:21,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809894801] [2022-11-16 11:08:21,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:21,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:08:21,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:21,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:08:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:08:21,216 INFO L87 Difference]: Start difference. First operand 207 states and 283 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-11-16 11:08:23,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:23,575 INFO L93 Difference]: Finished difference Result 494 states and 651 transitions. [2022-11-16 11:08:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 11:08:23,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-16 11:08:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:23,578 INFO L225 Difference]: With dead ends: 494 [2022-11-16 11:08:23,578 INFO L226 Difference]: Without dead ends: 433 [2022-11-16 11:08:23,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=375, Invalid=3785, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 11:08:23,581 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 213 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:23,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 216 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:08:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-16 11:08:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 207. [2022-11-16 11:08:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3640776699029127) internal successors, (281), 206 states have internal predecessors, (281), 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) [2022-11-16 11:08:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 281 transitions. [2022-11-16 11:08:23,675 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 281 transitions. Word has length 25 [2022-11-16 11:08:23,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:23,675 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 281 transitions. [2022-11-16 11:08:23,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-11-16 11:08:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 281 transitions. [2022-11-16 11:08:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:08:23,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:23,677 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:23,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:23,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:08:23,883 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:23,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:23,883 INFO L85 PathProgramCache]: Analyzing trace with hash -235040834, now seen corresponding path program 5 times [2022-11-16 11:08:23,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:23,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381278326] [2022-11-16 11:08:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:23,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:24,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:24,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381278326] [2022-11-16 11:08:24,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381278326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:24,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442194124] [2022-11-16 11:08:24,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:08:24,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:24,238 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:24,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:08:24,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:08:24,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:24,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:08:24,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:24,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:08:24,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442194124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:24,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:24,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 11] total 28 [2022-11-16 11:08:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757374729] [2022-11-16 11:08:24,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:24,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:08:24,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:08:24,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:08:24,996 INFO L87 Difference]: Start difference. First operand 207 states and 281 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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) [2022-11-16 11:08:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:27,691 INFO L93 Difference]: Finished difference Result 413 states and 608 transitions. [2022-11-16 11:08:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 11:08:27,692 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-16 11:08:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:27,694 INFO L225 Difference]: With dead ends: 413 [2022-11-16 11:08:27,694 INFO L226 Difference]: Without dead ends: 354 [2022-11-16 11:08:27,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1036, Invalid=3254, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 11:08:27,697 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 264 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:27,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 221 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:08:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-16 11:08:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 243. [2022-11-16 11:08:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.359504132231405) internal successors, (329), 242 states have internal predecessors, (329), 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) [2022-11-16 11:08:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 329 transitions. [2022-11-16 11:08:27,810 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 329 transitions. Word has length 25 [2022-11-16 11:08:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:27,811 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 329 transitions. [2022-11-16 11:08:27,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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) [2022-11-16 11:08:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 329 transitions. [2022-11-16 11:08:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 11:08:27,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:27,812 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:27,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:28,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:08:28,015 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1282371252, now seen corresponding path program 6 times [2022-11-16 11:08:28,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:28,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374229340] [2022-11-16 11:08:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:28,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:08:28,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:28,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374229340] [2022-11-16 11:08:28,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374229340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:28,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85129971] [2022-11-16 11:08:28,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:08:28,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:28,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:28,302 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:28,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:08:28,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 11:08:28,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:28,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:08:28,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 11:08:28,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 11:08:28,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85129971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:28,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:28,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2022-11-16 11:08:28,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112011411] [2022-11-16 11:08:28,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:28,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:08:28,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:28,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:08:28,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:08:28,603 INFO L87 Difference]: Start difference. First operand 243 states and 329 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2022-11-16 11:08:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:34,370 INFO L93 Difference]: Finished difference Result 726 states and 927 transitions. [2022-11-16 11:08:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-16 11:08:34,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 27 [2022-11-16 11:08:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:34,374 INFO L225 Difference]: With dead ends: 726 [2022-11-16 11:08:34,374 INFO L226 Difference]: Without dead ends: 661 [2022-11-16 11:08:34,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3853 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=960, Invalid=10170, Unknown=0, NotChecked=0, Total=11130 [2022-11-16 11:08:34,379 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 303 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:34,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 374 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 11:08:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-11-16 11:08:34,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 258. [2022-11-16 11:08:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.3579766536964981) internal successors, (349), 257 states have internal predecessors, (349), 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) [2022-11-16 11:08:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 349 transitions. [2022-11-16 11:08:34,523 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 349 transitions. Word has length 27 [2022-11-16 11:08:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:34,523 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 349 transitions. [2022-11-16 11:08:34,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2022-11-16 11:08:34,523 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 349 transitions. [2022-11-16 11:08:34,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 11:08:34,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:34,524 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:34,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:34,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:34,725 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash -866986772, now seen corresponding path program 1 times [2022-11-16 11:08:34,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:34,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969513145] [2022-11-16 11:08:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:34,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:08:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:35,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969513145] [2022-11-16 11:08:35,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969513145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:35,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671548555] [2022-11-16 11:08:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:35,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:35,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:35,076 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:35,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:08:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:35,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:08:35,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:08:35,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-16 11:08:35,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671548555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:35,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:35,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 5] total 16 [2022-11-16 11:08:35,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661350873] [2022-11-16 11:08:35,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:35,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:08:35,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:35,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:08:35,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:08:35,342 INFO L87 Difference]: Start difference. First operand 258 states and 349 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 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) [2022-11-16 11:08:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:36,258 INFO L93 Difference]: Finished difference Result 520 states and 765 transitions. [2022-11-16 11:08:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:08:36,259 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 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 27 [2022-11-16 11:08:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:36,261 INFO L225 Difference]: With dead ends: 520 [2022-11-16 11:08:36,262 INFO L226 Difference]: Without dead ends: 457 [2022-11-16 11:08:36,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:08:36,263 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 126 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:36,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 375 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:08:36,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-16 11:08:36,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 320. [2022-11-16 11:08:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.3573667711598747) internal successors, (433), 319 states have internal predecessors, (433), 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) [2022-11-16 11:08:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 433 transitions. [2022-11-16 11:08:36,399 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 433 transitions. Word has length 27 [2022-11-16 11:08:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:36,399 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 433 transitions. [2022-11-16 11:08:36,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 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) [2022-11-16 11:08:36,400 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 433 transitions. [2022-11-16 11:08:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:08:36,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:36,401 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:36,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:36,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:36,608 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:36,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:36,609 INFO L85 PathProgramCache]: Analyzing trace with hash 967140136, now seen corresponding path program 3 times [2022-11-16 11:08:36,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:36,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484900267] [2022-11-16 11:08:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:36,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:08:36,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:36,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484900267] [2022-11-16 11:08:36,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484900267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:36,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420749864] [2022-11-16 11:08:36,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:08:36,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:36,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:36,830 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:36,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:08:36,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:08:36,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:36,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:08:36,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:08:37,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:08:37,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420749864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:37,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:37,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-16 11:08:37,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508348020] [2022-11-16 11:08:37,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:37,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:08:37,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:37,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:08:37,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:08:37,064 INFO L87 Difference]: Start difference. First operand 320 states and 433 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:37,926 INFO L93 Difference]: Finished difference Result 521 states and 677 transitions. [2022-11-16 11:08:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:08:37,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-16 11:08:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:37,930 INFO L225 Difference]: With dead ends: 521 [2022-11-16 11:08:37,930 INFO L226 Difference]: Without dead ends: 494 [2022-11-16 11:08:37,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:08:37,932 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:37,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 101 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:08:37,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-11-16 11:08:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 325. [2022-11-16 11:08:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.3487654320987654) internal successors, (437), 324 states have internal predecessors, (437), 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) [2022-11-16 11:08:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 437 transitions. [2022-11-16 11:08:38,193 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 437 transitions. Word has length 28 [2022-11-16 11:08:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:38,194 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 437 transitions. [2022-11-16 11:08:38,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:38,194 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 437 transitions. [2022-11-16 11:08:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:08:38,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:38,195 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:38,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:38,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:08:38,402 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:38,402 INFO L85 PathProgramCache]: Analyzing trace with hash -18086136, now seen corresponding path program 7 times [2022-11-16 11:08:38,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:38,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262484920] [2022-11-16 11:08:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:38,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:38,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:38,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262484920] [2022-11-16 11:08:38,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262484920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:38,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983739845] [2022-11-16 11:08:38,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:08:38,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:38,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:38,815 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:38,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:08:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:38,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:08:38,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:08:39,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:08:39,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983739845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:39,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:39,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2022-11-16 11:08:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622455602] [2022-11-16 11:08:39,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:39,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:08:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:08:39,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:08:39,184 INFO L87 Difference]: Start difference. First operand 325 states and 437 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2022-11-16 11:08:56,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:56,224 INFO L93 Difference]: Finished difference Result 1049 states and 1343 transitions. [2022-11-16 11:08:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-11-16 11:08:56,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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 28 [2022-11-16 11:08:56,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:56,232 INFO L225 Difference]: With dead ends: 1049 [2022-11-16 11:08:56,232 INFO L226 Difference]: Without dead ends: 984 [2022-11-16 11:08:56,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14594 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=2296, Invalid=34376, Unknown=0, NotChecked=0, Total=36672 [2022-11-16 11:08:56,242 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 586 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:56,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 465 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-16 11:08:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-11-16 11:08:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 356. [2022-11-16 11:08:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.3549295774647887) internal successors, (481), 355 states have internal predecessors, (481), 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) [2022-11-16 11:08:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 481 transitions. [2022-11-16 11:08:56,477 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 481 transitions. Word has length 28 [2022-11-16 11:08:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:56,478 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 481 transitions. [2022-11-16 11:08:56,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2022-11-16 11:08:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 481 transitions. [2022-11-16 11:08:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:08:56,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:56,479 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:56,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:56,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 11:08:56,680 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2063179469, now seen corresponding path program 4 times [2022-11-16 11:08:56,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:56,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074630074] [2022-11-16 11:08:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:56,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:08:57,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:57,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074630074] [2022-11-16 11:08:57,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074630074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:57,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413695121] [2022-11-16 11:08:57,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:08:57,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:57,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:57,003 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:57,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:08:57,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:08:57,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:57,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:08:57,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:08:57,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-16 11:08:57,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413695121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:57,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:57,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 5] total 17 [2022-11-16 11:08:57,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142850277] [2022-11-16 11:08:57,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:57,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:08:57,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:08:57,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:08:57,302 INFO L87 Difference]: Start difference. First operand 356 states and 481 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-11-16 11:08:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:58,604 INFO L93 Difference]: Finished difference Result 665 states and 975 transitions. [2022-11-16 11:08:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:08:58,604 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 29 [2022-11-16 11:08:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:58,607 INFO L225 Difference]: With dead ends: 665 [2022-11-16 11:08:58,607 INFO L226 Difference]: Without dead ends: 587 [2022-11-16 11:08:58,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:08:58,609 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 162 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:58,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 467 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:08:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-16 11:08:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 347. [2022-11-16 11:08:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.3728323699421965) internal successors, (475), 346 states have internal predecessors, (475), 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) [2022-11-16 11:08:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 475 transitions. [2022-11-16 11:08:58,986 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 475 transitions. Word has length 29 [2022-11-16 11:08:58,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:58,987 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 475 transitions. [2022-11-16 11:08:58,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-11-16 11:08:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 475 transitions. [2022-11-16 11:08:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:08:58,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:58,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:59,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:59,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:59,195 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 5 times [2022-11-16 11:08:59,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:59,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880338408] [2022-11-16 11:08:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:59,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:08:59,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:59,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880338408] [2022-11-16 11:08:59,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880338408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:59,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826565030] [2022-11-16 11:08:59,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:08:59,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:59,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:59,496 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:59,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:08:59,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:08:59,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:59,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:08:59,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:08:59,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:08:59,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826565030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:59,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:59,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-11-16 11:08:59,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036402921] [2022-11-16 11:08:59,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:59,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:08:59,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:59,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:08:59,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:08:59,971 INFO L87 Difference]: Start difference. First operand 347 states and 475 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:00,936 INFO L93 Difference]: Finished difference Result 577 states and 777 transitions. [2022-11-16 11:09:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:09:00,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-16 11:09:00,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:00,940 INFO L225 Difference]: With dead ends: 577 [2022-11-16 11:09:00,940 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 11:09:00,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:09:00,943 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:00,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 152 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:09:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 11:09:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 340. [2022-11-16 11:09:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.3716814159292035) internal successors, (465), 339 states have internal predecessors, (465), 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) [2022-11-16 11:09:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 465 transitions. [2022-11-16 11:09:01,335 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 465 transitions. Word has length 30 [2022-11-16 11:09:01,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:01,336 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 465 transitions. [2022-11-16 11:09:01,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 465 transitions. [2022-11-16 11:09:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:09:01,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:01,340 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:01,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:01,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 11:09:01,546 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1329509959, now seen corresponding path program 6 times [2022-11-16 11:09:01,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:01,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549316486] [2022-11-16 11:09:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:01,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:09:01,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:01,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549316486] [2022-11-16 11:09:01,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549316486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:01,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131931309] [2022-11-16 11:09:01,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:09:01,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:01,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:01,855 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:01,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:09:01,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:09:01,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:01,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:09:01,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:09:02,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:09:02,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131931309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:02,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:02,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-11-16 11:09:02,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797656754] [2022-11-16 11:09:02,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:02,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:09:02,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:09:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:09:02,160 INFO L87 Difference]: Start difference. First operand 340 states and 465 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2022-11-16 11:09:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:03,914 INFO L93 Difference]: Finished difference Result 712 states and 937 transitions. [2022-11-16 11:09:03,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:09:03,915 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 30 [2022-11-16 11:09:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:03,918 INFO L225 Difference]: With dead ends: 712 [2022-11-16 11:09:03,918 INFO L226 Difference]: Without dead ends: 650 [2022-11-16 11:09:03,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:09:03,920 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 141 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:03,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 231 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:09:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-11-16 11:09:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 369. [2022-11-16 11:09:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.3423913043478262) internal successors, (494), 368 states have internal predecessors, (494), 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) [2022-11-16 11:09:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 494 transitions. [2022-11-16 11:09:04,201 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 494 transitions. Word has length 30 [2022-11-16 11:09:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:04,201 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 494 transitions. [2022-11-16 11:09:04,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2022-11-16 11:09:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 494 transitions. [2022-11-16 11:09:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:09:04,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:04,203 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:04,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:04,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 11:09:04,410 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:04,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:04,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1974452903, now seen corresponding path program 5 times [2022-11-16 11:09:04,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:04,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950870510] [2022-11-16 11:09:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:04,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 11:09:04,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:04,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950870510] [2022-11-16 11:09:04,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950870510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:04,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357211037] [2022-11-16 11:09:04,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:09:04,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:04,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:04,678 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:04,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:09:05,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 11:09:05,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:05,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:09:05,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 11:09:05,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 11:09:05,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357211037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:05,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:05,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2022-11-16 11:09:05,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896231530] [2022-11-16 11:09:05,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:05,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:09:05,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:09:05,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:09:05,367 INFO L87 Difference]: Start difference. First operand 369 states and 494 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 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) [2022-11-16 11:09:07,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:07,562 INFO L93 Difference]: Finished difference Result 555 states and 751 transitions. [2022-11-16 11:09:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 11:09:07,564 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 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) Word has length 30 [2022-11-16 11:09:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:07,566 INFO L225 Difference]: With dead ends: 555 [2022-11-16 11:09:07,566 INFO L226 Difference]: Without dead ends: 432 [2022-11-16 11:09:07,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 11:09:07,567 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 104 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:07,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 309 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:09:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-16 11:09:07,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 350. [2022-11-16 11:09:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.33810888252149) internal successors, (467), 349 states have internal predecessors, (467), 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) [2022-11-16 11:09:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 467 transitions. [2022-11-16 11:09:07,878 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 467 transitions. Word has length 30 [2022-11-16 11:09:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:07,878 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 467 transitions. [2022-11-16 11:09:07,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 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) [2022-11-16 11:09:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 467 transitions. [2022-11-16 11:09:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 11:09:07,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:07,880 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:07,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-16 11:09:08,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 11:09:08,092 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:08,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1370456194, now seen corresponding path program 8 times [2022-11-16 11:09:08,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:08,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691499335] [2022-11-16 11:09:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:08,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:08,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:08,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691499335] [2022-11-16 11:09:08,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691499335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:08,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126576283] [2022-11-16 11:09:08,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:09:08,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:08,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:08,581 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:08,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:09:08,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:09:08,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:08,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:09:08,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:09:08,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:09:08,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126576283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:08,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:08,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-11-16 11:09:08,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202869931] [2022-11-16 11:09:08,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:08,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:09:08,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:09:08,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:09:08,958 INFO L87 Difference]: Start difference. First operand 350 states and 467 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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) [2022-11-16 11:09:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:38,830 INFO L93 Difference]: Finished difference Result 1250 states and 1586 transitions. [2022-11-16 11:09:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-11-16 11:09:38,831 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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 31 [2022-11-16 11:09:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:38,835 INFO L225 Difference]: With dead ends: 1250 [2022-11-16 11:09:38,835 INFO L226 Difference]: Without dead ends: 1170 [2022-11-16 11:09:38,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25149 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=3342, Invalid=57914, Unknown=0, NotChecked=0, Total=61256 [2022-11-16 11:09:38,843 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 673 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 3204 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 3204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:38,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 700 Invalid, 3581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 3204 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-16 11:09:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-11-16 11:09:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 409. [2022-11-16 11:09:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.3333333333333333) internal successors, (544), 408 states have internal predecessors, (544), 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) [2022-11-16 11:09:39,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 544 transitions. [2022-11-16 11:09:39,384 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 544 transitions. Word has length 31 [2022-11-16 11:09:39,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:39,384 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 544 transitions. [2022-11-16 11:09:39,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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) [2022-11-16 11:09:39,385 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 544 transitions. [2022-11-16 11:09:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 11:09:39,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:39,386 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:39,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:39,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:09:39,591 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:39,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:39,591 INFO L85 PathProgramCache]: Analyzing trace with hash 306595180, now seen corresponding path program 2 times [2022-11-16 11:09:39,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:39,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945846286] [2022-11-16 11:09:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:39,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:09:39,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:39,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945846286] [2022-11-16 11:09:39,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945846286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:39,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644058437] [2022-11-16 11:09:39,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:09:39,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:39,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:39,953 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:39,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:09:40,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:09:40,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:09:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:09:40,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 11:09:40,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644058437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:40,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:40,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 8] total 25 [2022-11-16 11:09:40,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128033074] [2022-11-16 11:09:40,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:40,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:09:40,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:40,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:09:40,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:09:40,377 INFO L87 Difference]: Start difference. First operand 409 states and 544 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:42,095 INFO L93 Difference]: Finished difference Result 793 states and 1152 transitions. [2022-11-16 11:09:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 11:09:42,096 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-16 11:09:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:42,099 INFO L225 Difference]: With dead ends: 793 [2022-11-16 11:09:42,099 INFO L226 Difference]: Without dead ends: 688 [2022-11-16 11:09:42,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=966, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:09:42,100 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 237 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:42,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 612 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:09:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-11-16 11:09:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 456. [2022-11-16 11:09:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.3296703296703296) internal successors, (605), 455 states have internal predecessors, (605), 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) [2022-11-16 11:09:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 605 transitions. [2022-11-16 11:09:42,483 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 605 transitions. Word has length 31 [2022-11-16 11:09:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:42,484 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 605 transitions. [2022-11-16 11:09:42,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:42,484 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 605 transitions. [2022-11-16 11:09:42,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 11:09:42,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:42,485 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:42,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:42,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 11:09:42,686 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:42,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:42,686 INFO L85 PathProgramCache]: Analyzing trace with hash 541073756, now seen corresponding path program 3 times [2022-11-16 11:09:42,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:42,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210126300] [2022-11-16 11:09:42,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:42,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:09:43,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:43,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210126300] [2022-11-16 11:09:43,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210126300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:43,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888467416] [2022-11-16 11:09:43,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:09:43,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:43,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:43,054 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:43,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:09:43,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:09:43,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:09:43,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 11:09:43,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 11:09:43,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888467416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:43,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:43,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 21 [2022-11-16 11:09:43,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876789086] [2022-11-16 11:09:43,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:43,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:09:43,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:43,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:09:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:09:43,294 INFO L87 Difference]: Start difference. First operand 456 states and 605 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2022-11-16 11:09:47,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:47,811 INFO L93 Difference]: Finished difference Result 834 states and 1179 transitions. [2022-11-16 11:09:47,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-16 11:09:47,811 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 33 [2022-11-16 11:09:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:47,813 INFO L225 Difference]: With dead ends: 834 [2022-11-16 11:09:47,813 INFO L226 Difference]: Without dead ends: 636 [2022-11-16 11:09:47,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=784, Invalid=8918, Unknown=0, NotChecked=0, Total=9702 [2022-11-16 11:09:47,814 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 150 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:47,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 526 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:09:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-11-16 11:09:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 471. [2022-11-16 11:09:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.325531914893617) internal successors, (623), 470 states have internal predecessors, (623), 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) [2022-11-16 11:09:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 623 transitions. [2022-11-16 11:09:48,277 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 623 transitions. Word has length 33 [2022-11-16 11:09:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:48,277 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 623 transitions. [2022-11-16 11:09:48,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2022-11-16 11:09:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 623 transitions. [2022-11-16 11:09:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:09:48,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:48,280 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:48,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:48,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:09:48,485 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:48,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:48,486 INFO L85 PathProgramCache]: Analyzing trace with hash 89661625, now seen corresponding path program 6 times [2022-11-16 11:09:48,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:48,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220883569] [2022-11-16 11:09:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:48,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:09:48,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:48,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220883569] [2022-11-16 11:09:48,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220883569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:48,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149156413] [2022-11-16 11:09:48,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:09:48,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:48,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:48,895 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:48,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 11:09:49,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-16 11:09:49,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:49,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:09:49,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:09:49,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:09:49,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149156413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:49,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:49,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-11-16 11:09:49,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257316299] [2022-11-16 11:09:49,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:49,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:09:49,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:49,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:09:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:09:49,386 INFO L87 Difference]: Start difference. First operand 471 states and 623 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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) [2022-11-16 11:10:14,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:14,507 INFO L93 Difference]: Finished difference Result 1586 states and 1925 transitions. [2022-11-16 11:10:14,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2022-11-16 11:10:14,508 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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 34 [2022-11-16 11:10:14,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:14,512 INFO L225 Difference]: With dead ends: 1586 [2022-11-16 11:10:14,512 INFO L226 Difference]: Without dead ends: 1473 [2022-11-16 11:10:14,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25302 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=3464, Invalid=57792, Unknown=0, NotChecked=0, Total=61256 [2022-11-16 11:10:14,516 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 693 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:14,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 699 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-16 11:10:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2022-11-16 11:10:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 433. [2022-11-16 11:10:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.337962962962963) internal successors, (578), 432 states have internal predecessors, (578), 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) [2022-11-16 11:10:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 578 transitions. [2022-11-16 11:10:14,912 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 578 transitions. Word has length 34 [2022-11-16 11:10:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:14,912 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 578 transitions. [2022-11-16 11:10:14,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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) [2022-11-16 11:10:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 578 transitions. [2022-11-16 11:10:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:10:14,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:14,914 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:14,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:15,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:15,120 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:15,121 INFO L85 PathProgramCache]: Analyzing trace with hash 386903752, now seen corresponding path program 9 times [2022-11-16 11:10:15,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:15,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422224649] [2022-11-16 11:10:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:15,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:15,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422224649] [2022-11-16 11:10:15,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422224649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:15,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931165044] [2022-11-16 11:10:15,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:10:15,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:15,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:15,587 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:15,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 11:10:15,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 11:10:15,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:15,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:10:15,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:16,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:10:16,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931165044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:16,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:10:16,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 17] total 43 [2022-11-16 11:10:16,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40540134] [2022-11-16 11:10:16,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:16,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 11:10:16,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:16,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 11:10:16,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:10:16,768 INFO L87 Difference]: Start difference. First operand 433 states and 578 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:27,853 INFO L93 Difference]: Finished difference Result 875 states and 1307 transitions. [2022-11-16 11:10:27,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-16 11:10:27,854 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 11:10:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:27,856 INFO L225 Difference]: With dead ends: 875 [2022-11-16 11:10:27,856 INFO L226 Difference]: Without dead ends: 790 [2022-11-16 11:10:27,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=4175, Invalid=13647, Unknown=0, NotChecked=0, Total=17822 [2022-11-16 11:10:27,857 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 634 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 3976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 784 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:27,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 707 Invalid, 3976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [784 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 11:10:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-16 11:10:28,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 510. [2022-11-16 11:10:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.343811394891945) internal successors, (684), 509 states have internal predecessors, (684), 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) [2022-11-16 11:10:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 684 transitions. [2022-11-16 11:10:28,393 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 684 transitions. Word has length 34 [2022-11-16 11:10:28,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:28,394 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 684 transitions. [2022-11-16 11:10:28,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:28,395 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 684 transitions. [2022-11-16 11:10:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 11:10:28,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:28,396 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:28,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:28,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 11:10:28,601 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash -557084594, now seen corresponding path program 4 times [2022-11-16 11:10:28,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:28,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172088080] [2022-11-16 11:10:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:28,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:10:28,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:28,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172088080] [2022-11-16 11:10:28,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172088080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:28,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526986457] [2022-11-16 11:10:28,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:10:28,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:28,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:28,977 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:28,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 11:10:29,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:10:29,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:29,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 11:10:29,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:10:29,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-16 11:10:29,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526986457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:29,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:10:29,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 6] total 22 [2022-11-16 11:10:29,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434232904] [2022-11-16 11:10:29,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:29,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:10:29,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:29,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:10:29,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:10:29,303 INFO L87 Difference]: Start difference. First operand 510 states and 684 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 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) [2022-11-16 11:10:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:31,533 INFO L93 Difference]: Finished difference Result 971 states and 1415 transitions. [2022-11-16 11:10:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:10:31,534 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 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 35 [2022-11-16 11:10:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:31,536 INFO L225 Difference]: With dead ends: 971 [2022-11-16 11:10:31,536 INFO L226 Difference]: Without dead ends: 860 [2022-11-16 11:10:31,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=321, Invalid=1011, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:10:31,538 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 267 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:31,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 776 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:10:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-16 11:10:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 586. [2022-11-16 11:10:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.34017094017094) internal successors, (784), 585 states have internal predecessors, (784), 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) [2022-11-16 11:10:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 784 transitions. [2022-11-16 11:10:32,160 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 784 transitions. Word has length 35 [2022-11-16 11:10:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:32,161 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 784 transitions. [2022-11-16 11:10:32,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 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) [2022-11-16 11:10:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 784 transitions. [2022-11-16 11:10:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:10:32,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:32,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:32,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:32,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:32,367 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:32,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 7 times [2022-11-16 11:10:32,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:32,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350497483] [2022-11-16 11:10:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:32,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 11:10:32,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:32,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350497483] [2022-11-16 11:10:32,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350497483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:32,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623514082] [2022-11-16 11:10:32,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:10:32,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:32,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:32,683 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:32,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 11:10:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:32,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:10:32,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:10:32,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:10:32,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623514082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:32,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:10:32,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-11-16 11:10:32,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161570979] [2022-11-16 11:10:32,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:32,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:10:32,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:10:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:10:32,863 INFO L87 Difference]: Start difference. First operand 586 states and 784 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2022-11-16 11:10:34,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:34,608 INFO L93 Difference]: Finished difference Result 988 states and 1283 transitions. [2022-11-16 11:10:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:10:34,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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 36 [2022-11-16 11:10:34,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:34,610 INFO L225 Difference]: With dead ends: 988 [2022-11-16 11:10:34,610 INFO L226 Difference]: Without dead ends: 836 [2022-11-16 11:10:34,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:10:34,611 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:34,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 224 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:10:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-16 11:10:35,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 575. [2022-11-16 11:10:35,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3379790940766552) internal successors, (768), 574 states have internal predecessors, (768), 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) [2022-11-16 11:10:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 768 transitions. [2022-11-16 11:10:35,320 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 768 transitions. Word has length 36 [2022-11-16 11:10:35,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:35,320 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 768 transitions. [2022-11-16 11:10:35,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2022-11-16 11:10:35,320 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 768 transitions. [2022-11-16 11:10:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:10:35,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:35,322 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:35,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:35,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:35,528 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash -922807928, now seen corresponding path program 8 times [2022-11-16 11:10:35,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:35,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153858758] [2022-11-16 11:10:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 11:10:35,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:35,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153858758] [2022-11-16 11:10:35,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153858758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:35,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537929729] [2022-11-16 11:10:35,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:10:35,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:35,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:35,951 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:35,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 11:10:36,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:10:36,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:10:36,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 11:10:36,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 11:10:36,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537929729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:36,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:10:36,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2022-11-16 11:10:36,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589153379] [2022-11-16 11:10:36,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:36,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:10:36,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:36,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:10:36,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:10:36,268 INFO L87 Difference]: Start difference. First operand 575 states and 768 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:40,733 INFO L93 Difference]: Finished difference Result 1389 states and 1766 transitions. [2022-11-16 11:10:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:10:40,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-16 11:10:40,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:40,736 INFO L225 Difference]: With dead ends: 1389 [2022-11-16 11:10:40,736 INFO L226 Difference]: Without dead ends: 1308 [2022-11-16 11:10:40,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:10:40,737 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 232 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:40,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 274 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:10:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-11-16 11:10:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 681. [2022-11-16 11:10:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.3205882352941176) internal successors, (898), 680 states have internal predecessors, (898), 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) [2022-11-16 11:10:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 898 transitions. [2022-11-16 11:10:41,458 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 898 transitions. Word has length 36 [2022-11-16 11:10:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:41,459 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 898 transitions. [2022-11-16 11:10:41,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 898 transitions. [2022-11-16 11:10:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:10:41,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:41,461 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:41,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:41,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 11:10:41,671 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1662320984, now seen corresponding path program 10 times [2022-11-16 11:10:41,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:41,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267352276] [2022-11-16 11:10:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:41,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-16 11:10:42,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:42,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267352276] [2022-11-16 11:10:42,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267352276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:42,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289206654] [2022-11-16 11:10:42,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:10:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:42,100 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:42,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 11:10:42,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:10:42,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:42,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:10:42,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-16 11:10:42,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-16 11:10:42,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289206654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:42,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:10:42,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2022-11-16 11:10:42,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560104316] [2022-11-16 11:10:42,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:42,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:10:42,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:10:42,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:10:42,508 INFO L87 Difference]: Start difference. First operand 681 states and 898 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 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) [2022-11-16 11:11:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:35,282 INFO L93 Difference]: Finished difference Result 2059 states and 2502 transitions. [2022-11-16 11:11:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 305 states. [2022-11-16 11:11:35,283 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 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 36 [2022-11-16 11:11:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:35,286 INFO L225 Difference]: With dead ends: 2059 [2022-11-16 11:11:35,286 INFO L226 Difference]: Without dead ends: 1926 [2022-11-16 11:11:35,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41456 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=5597, Invalid=92059, Unknown=0, NotChecked=0, Total=97656 [2022-11-16 11:11:35,291 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 721 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:35,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 688 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-16 11:11:35,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2022-11-16 11:11:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 659. [2022-11-16 11:11:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.3161094224924013) internal successors, (866), 658 states have internal predecessors, (866), 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) [2022-11-16 11:11:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 866 transitions. [2022-11-16 11:11:36,010 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 866 transitions. Word has length 36 [2022-11-16 11:11:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:36,010 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 866 transitions. [2022-11-16 11:11:36,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 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) [2022-11-16 11:11:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 866 transitions. [2022-11-16 11:11:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:11:36,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:36,013 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:36,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:36,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:36,214 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:36,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -298016775, now seen corresponding path program 9 times [2022-11-16 11:11:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:36,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122657240] [2022-11-16 11:11:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:36,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:11:36,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:36,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122657240] [2022-11-16 11:11:36,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122657240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:36,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435730354] [2022-11-16 11:11:36,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:11:36,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:36,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:36,685 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:36,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 11:11:36,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:11:36,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:11:36,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:11:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-16 11:11:36,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-16 11:11:37,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435730354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:11:37,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:11:37,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 10] total 31 [2022-11-16 11:11:37,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222337480] [2022-11-16 11:11:37,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:11:37,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:11:37,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:37,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:11:37,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:11:37,280 INFO L87 Difference]: Start difference. First operand 659 states and 866 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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) [2022-11-16 11:11:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:43,783 INFO L93 Difference]: Finished difference Result 1274 states and 1842 transitions. [2022-11-16 11:11:43,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-16 11:11:43,785 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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 36 [2022-11-16 11:11:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:43,788 INFO L225 Difference]: With dead ends: 1274 [2022-11-16 11:11:43,788 INFO L226 Difference]: Without dead ends: 1094 [2022-11-16 11:11:43,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1182, Invalid=10590, Unknown=0, NotChecked=0, Total=11772 [2022-11-16 11:11:43,789 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 391 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2825 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 2825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:43,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1008 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 2825 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-16 11:11:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-11-16 11:11:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 749. [2022-11-16 11:11:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.3181818181818181) internal successors, (986), 748 states have internal predecessors, (986), 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) [2022-11-16 11:11:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 986 transitions. [2022-11-16 11:11:44,591 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 986 transitions. Word has length 36 [2022-11-16 11:11:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:44,591 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 986 transitions. [2022-11-16 11:11:44,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 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) [2022-11-16 11:11:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 986 transitions. [2022-11-16 11:11:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 11:11:44,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:44,593 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:44,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-16 11:11:44,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 11:11:44,799 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:44,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1963294526, now seen corresponding path program 11 times [2022-11-16 11:11:44,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:44,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093902288] [2022-11-16 11:11:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:44,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:45,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:45,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093902288] [2022-11-16 11:11:45,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093902288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:45,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615047653] [2022-11-16 11:11:45,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:11:45,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:45,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:45,357 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:45,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 11:11:46,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-16 11:11:46,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:11:46,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 11:11:46,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:46,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 11:11:47,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615047653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:11:47,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:11:47,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 19] total 48 [2022-11-16 11:11:47,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345515780] [2022-11-16 11:11:47,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:11:47,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 11:11:47,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:47,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 11:11:47,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1805, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 11:11:47,749 INFO L87 Difference]: Start difference. First operand 749 states and 986 transitions. Second operand has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 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) [2022-11-16 11:12:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:04,855 INFO L93 Difference]: Finished difference Result 1427 states and 2032 transitions. [2022-11-16 11:12:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-11-16 11:12:04,856 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-16 11:12:04,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:04,860 INFO L225 Difference]: With dead ends: 1427 [2022-11-16 11:12:04,860 INFO L226 Difference]: Without dead ends: 1326 [2022-11-16 11:12:04,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8347 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=5634, Invalid=19172, Unknown=0, NotChecked=0, Total=24806 [2022-11-16 11:12:04,862 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 675 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 3711 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 4612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 3711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:04,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 751 Invalid, 4612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 3711 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 11:12:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-11-16 11:12:05,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 813. [2022-11-16 11:12:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.3201970443349753) internal successors, (1072), 812 states have internal predecessors, (1072), 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) [2022-11-16 11:12:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1072 transitions. [2022-11-16 11:12:05,909 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1072 transitions. Word has length 37 [2022-11-16 11:12:05,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:05,909 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1072 transitions. [2022-11-16 11:12:05,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 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) [2022-11-16 11:12:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1072 transitions. [2022-11-16 11:12:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 11:12:05,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:05,911 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:05,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-16 11:12:06,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 11:12:06,117 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:06,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1382972419, now seen corresponding path program 7 times [2022-11-16 11:12:06,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:06,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009755887] [2022-11-16 11:12:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:06,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-16 11:12:06,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:06,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009755887] [2022-11-16 11:12:06,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009755887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:06,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999674225] [2022-11-16 11:12:06,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:12:06,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:06,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:06,621 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:06,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 11:12:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:12:06,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-16 11:12:07,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-16 11:12:07,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999674225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:07,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:07,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2022-11-16 11:12:07,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719994953] [2022-11-16 11:12:07,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:07,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:12:07,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:07,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:12:07,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:12:07,080 INFO L87 Difference]: Start difference. First operand 813 states and 1072 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-11-16 11:12:57,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:13:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:16,653 INFO L93 Difference]: Finished difference Result 2531 states and 3027 transitions. [2022-11-16 11:13:16,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 375 states. [2022-11-16 11:13:16,653 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 39 [2022-11-16 11:13:16,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:16,658 INFO L225 Difference]: With dead ends: 2531 [2022-11-16 11:13:16,658 INFO L226 Difference]: Without dead ends: 2414 [2022-11-16 11:13:16,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63538 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=6773, Invalid=139533, Unknown=0, NotChecked=0, Total=146306 [2022-11-16 11:13:16,664 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 892 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 3536 mSolverCounterSat, 676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 4212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 676 IncrementalHoareTripleChecker+Valid, 3536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:16,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 891 Invalid, 4212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [676 Valid, 3536 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-11-16 11:13:16,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2022-11-16 11:13:17,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 765. [2022-11-16 11:13:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 1.3193717277486912) internal successors, (1008), 764 states have internal predecessors, (1008), 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) [2022-11-16 11:13:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1008 transitions. [2022-11-16 11:13:17,719 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1008 transitions. Word has length 39 [2022-11-16 11:13:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:17,719 INFO L495 AbstractCegarLoop]: Abstraction has 765 states and 1008 transitions. [2022-11-16 11:13:17,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-11-16 11:13:17,719 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1008 transitions. [2022-11-16 11:13:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 11:13:17,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:17,720 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:17,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:17,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 11:13:17,921 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash 843702860, now seen corresponding path program 12 times [2022-11-16 11:13:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:17,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670460665] [2022-11-16 11:13:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:17,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 11:13:18,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:18,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670460665] [2022-11-16 11:13:18,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670460665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:18,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728782292] [2022-11-16 11:13:18,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:13:18,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:18,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:18,490 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:18,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 11:13:18,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-16 11:13:18,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:13:18,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:13:18,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-16 11:13:19,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-16 11:13:19,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728782292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:19,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:13:19,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2022-11-16 11:13:19,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567434471] [2022-11-16 11:13:19,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:19,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:13:19,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:19,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:13:19,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:13:19,141 INFO L87 Difference]: Start difference. First operand 765 states and 1008 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 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) [2022-11-16 11:15:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:14,523 INFO L93 Difference]: Finished difference Result 2769 states and 3339 transitions. [2022-11-16 11:15:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 414 states. [2022-11-16 11:15:14,524 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 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 39 [2022-11-16 11:15:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:14,529 INFO L225 Difference]: With dead ends: 2769 [2022-11-16 11:15:14,529 INFO L226 Difference]: Without dead ends: 2657 [2022-11-16 11:15:14,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78664 ImplicationChecksByTransitivity, 88.8s TimeCoverageRelationStatistics Valid=9243, Invalid=169263, Unknown=0, NotChecked=0, Total=178506 [2022-11-16 11:15:14,536 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1111 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 3102 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 3981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 3102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:14,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 827 Invalid, 3981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 3102 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2022-11-16 11:15:14,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2022-11-16 11:15:15,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 804. [2022-11-16 11:15:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 1.3175591531755915) internal successors, (1058), 803 states have internal predecessors, (1058), 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) [2022-11-16 11:15:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1058 transitions. [2022-11-16 11:15:15,704 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1058 transitions. Word has length 39 [2022-11-16 11:15:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:15,704 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 1058 transitions. [2022-11-16 11:15:15,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 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) [2022-11-16 11:15:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1058 transitions. [2022-11-16 11:15:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 11:15:15,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:15,707 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:15,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:15,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 11:15:15,913 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:15:15,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:15,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1969715723, now seen corresponding path program 10 times [2022-11-16 11:15:15,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:15,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94743497] [2022-11-16 11:15:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:15,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 11:15:16,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:16,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94743497] [2022-11-16 11:15:16,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94743497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:16,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405752627] [2022-11-16 11:15:16,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:15:16,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:16,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:16,510 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:16,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 11:15:16,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:15:16,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:16,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 11:15:16,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:15:16,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-16 11:15:16,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405752627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:16,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:16,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 6] total 25 [2022-11-16 11:15:16,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237126559] [2022-11-16 11:15:16,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:16,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:15:16,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:16,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:15:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:15:16,915 INFO L87 Difference]: Start difference. First operand 804 states and 1058 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:21,161 INFO L93 Difference]: Finished difference Result 1486 states and 2145 transitions. [2022-11-16 11:15:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 11:15:21,162 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-16 11:15:21,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:21,165 INFO L225 Difference]: With dead ends: 1486 [2022-11-16 11:15:21,165 INFO L226 Difference]: Without dead ends: 1316 [2022-11-16 11:15:21,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:15:21,166 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 360 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:21,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 1235 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:15:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-11-16 11:15:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 869. [2022-11-16 11:15:22,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.314516129032258) internal successors, (1141), 868 states have internal predecessors, (1141), 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) [2022-11-16 11:15:22,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1141 transitions. [2022-11-16 11:15:22,374 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1141 transitions. Word has length 39 [2022-11-16 11:15:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:22,375 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1141 transitions. [2022-11-16 11:15:22,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:22,375 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1141 transitions. [2022-11-16 11:15:22,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 11:15:22,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:22,376 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:22,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:22,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 11:15:22,577 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:15:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:22,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1143634296, now seen corresponding path program 13 times [2022-11-16 11:15:22,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:22,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24284554] [2022-11-16 11:15:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:22,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:23,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24284554] [2022-11-16 11:15:23,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24284554] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308134605] [2022-11-16 11:15:23,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:15:23,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:23,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:23,242 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:23,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 11:15:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:23,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 11:15:23,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 11:15:23,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 11:15:23,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308134605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:23,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:23,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2022-11-16 11:15:23,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826845421] [2022-11-16 11:15:23,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:23,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:15:23,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:23,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:15:23,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:15:23,917 INFO L87 Difference]: Start difference. First operand 869 states and 1141 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 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) [2022-11-16 11:21:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:20,689 INFO L93 Difference]: Finished difference Result 3593 states and 4375 transitions. [2022-11-16 11:21:20,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 696 states. [2022-11-16 11:21:20,690 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 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 40 [2022-11-16 11:21:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:20,703 INFO L225 Difference]: With dead ends: 3593 [2022-11-16 11:21:20,703 INFO L226 Difference]: Without dead ends: 3470 [2022-11-16 11:21:20,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 713 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235355 ImplicationChecksByTransitivity, 300.3s TimeCoverageRelationStatistics Valid=18043, Invalid=492467, Unknown=0, NotChecked=0, Total=510510 [2022-11-16 11:21:20,732 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 2011 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 9336 mSolverCounterSat, 1736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 11072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1736 IncrementalHoareTripleChecker+Valid, 9336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:20,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2011 Valid, 1188 Invalid, 11072 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1736 Valid, 9336 Invalid, 0 Unknown, 0 Unchecked, 37.0s Time] [2022-11-16 11:21:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2022-11-16 11:21:22,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 923. [2022-11-16 11:21:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.322125813449024) internal successors, (1219), 922 states have internal predecessors, (1219), 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) [2022-11-16 11:21:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1219 transitions. [2022-11-16 11:21:22,282 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1219 transitions. Word has length 40 [2022-11-16 11:21:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:22,282 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1219 transitions. [2022-11-16 11:21:22,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 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) [2022-11-16 11:21:22,282 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1219 transitions. [2022-11-16 11:21:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:21:22,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:22,283 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:22,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:22,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:21:22,484 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:21:22,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:22,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1907019278, now seen corresponding path program 11 times [2022-11-16 11:21:22,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:21:22,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001240153] [2022-11-16 11:21:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:22,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:21:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:21:23,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:21:23,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001240153] [2022-11-16 11:21:23,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001240153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:21:23,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493122484] [2022-11-16 11:21:23,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:21:23,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:21:23,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:21:23,017 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:21:23,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 11:21:25,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-16 11:21:25,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:21:25,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 11:21:25,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:21:25,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 11:21:25,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493122484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:25,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:21:25,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 6] total 26 [2022-11-16 11:21:25,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003441461] [2022-11-16 11:21:25,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:25,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:21:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:21:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:21:25,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:21:25,651 INFO L87 Difference]: Start difference. First operand 923 states and 1219 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 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) [2022-11-16 11:21:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:30,118 INFO L93 Difference]: Finished difference Result 1636 states and 2356 transitions. [2022-11-16 11:21:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 11:21:30,119 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-16 11:21:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:30,123 INFO L225 Difference]: With dead ends: 1636 [2022-11-16 11:21:30,124 INFO L226 Difference]: Without dead ends: 1463 [2022-11-16 11:21:30,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=447, Invalid=1445, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 11:21:30,126 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 385 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:30,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1244 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:21:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-11-16 11:21:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 879. [2022-11-16 11:21:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.3405466970387243) internal successors, (1177), 878 states have internal predecessors, (1177), 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) [2022-11-16 11:21:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1177 transitions. [2022-11-16 11:21:31,624 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1177 transitions. Word has length 41 [2022-11-16 11:21:31,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:31,624 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1177 transitions. [2022-11-16 11:21:31,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 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) [2022-11-16 11:21:31,625 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1177 transitions. [2022-11-16 11:21:31,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 11:21:31,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:31,626 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:31,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:31,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:21:31,826 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:21:31,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:31,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2041166362, now seen corresponding path program 12 times [2022-11-16 11:21:31,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:21:31,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360150710] [2022-11-16 11:21:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:31,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:21:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:21:32,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:21:32,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360150710] [2022-11-16 11:21:32,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360150710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:21:32,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499351818] [2022-11-16 11:21:32,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:21:32,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:21:32,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:21:32,218 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:21:32,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 11:21:32,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 11:21:32,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:21:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 11:21:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 11:21:32,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 11:21:32,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499351818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:32,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:21:32,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-11-16 11:21:32,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769569098] [2022-11-16 11:21:32,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:32,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:21:32,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:21:32,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:21:32,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:21:32,464 INFO L87 Difference]: Start difference. First operand 879 states and 1177 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2022-11-16 11:21:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:37,913 INFO L93 Difference]: Finished difference Result 1619 states and 2078 transitions. [2022-11-16 11:21:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:21:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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 42 [2022-11-16 11:21:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:37,917 INFO L225 Difference]: With dead ends: 1619 [2022-11-16 11:21:37,917 INFO L226 Difference]: Without dead ends: 1391 [2022-11-16 11:21:37,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:21:37,919 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:37,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 285 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:21:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2022-11-16 11:21:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 847. [2022-11-16 11:21:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.3486997635933806) internal successors, (1141), 846 states have internal predecessors, (1141), 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) [2022-11-16 11:21:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1141 transitions. [2022-11-16 11:21:39,473 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1141 transitions. Word has length 42 [2022-11-16 11:21:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:39,473 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1141 transitions. [2022-11-16 11:21:39,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2022-11-16 11:21:39,474 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1141 transitions. [2022-11-16 11:21:39,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 11:21:39,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:39,475 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:39,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:39,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-16 11:21:39,681 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:21:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1591776935, now seen corresponding path program 13 times [2022-11-16 11:21:39,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:21:39,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199944213] [2022-11-16 11:21:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:39,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:21:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 11:21:40,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:21:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199944213] [2022-11-16 11:21:40,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199944213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:21:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742109483] [2022-11-16 11:21:40,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:21:40,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:21:40,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:21:40,111 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:21:40,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 11:21:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 11:21:40,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 11:21:40,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 11:21:40,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742109483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:40,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:21:40,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2022-11-16 11:21:40,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299041239] [2022-11-16 11:21:40,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:40,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:21:40,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:21:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:21:40,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:21:40,438 INFO L87 Difference]: Start difference. First operand 847 states and 1141 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 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) [2022-11-16 11:21:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:54,755 INFO L93 Difference]: Finished difference Result 2338 states and 2907 transitions. [2022-11-16 11:21:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 11:21:54,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-16 11:21:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:54,760 INFO L225 Difference]: With dead ends: 2338 [2022-11-16 11:21:54,761 INFO L226 Difference]: Without dead ends: 2228 [2022-11-16 11:21:54,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=454, Invalid=1708, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:21:54,762 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 550 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:54,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 239 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:21:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2022-11-16 11:21:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 928. [2022-11-16 11:21:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.3419633225458467) internal successors, (1244), 927 states have internal predecessors, (1244), 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) [2022-11-16 11:21:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1244 transitions. [2022-11-16 11:21:56,278 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1244 transitions. Word has length 42 [2022-11-16 11:21:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:56,278 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1244 transitions. [2022-11-16 11:21:56,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 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) [2022-11-16 11:21:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1244 transitions. [2022-11-16 11:21:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 11:21:56,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:56,280 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:56,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:56,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:21:56,484 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:21:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:56,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2003608313, now seen corresponding path program 8 times [2022-11-16 11:21:56,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:21:56,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576793274] [2022-11-16 11:21:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:56,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:21:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-16 11:21:56,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:21:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576793274] [2022-11-16 11:21:56,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576793274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:21:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799434065] [2022-11-16 11:21:56,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:21:56,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:21:56,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:21:56,967 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:21:56,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20156512-9b98-4abb-adb4-dd38a15a4ac5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 11:21:57,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:21:57,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:21:57,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:21:57,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-16 11:21:57,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-16 11:21:57,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799434065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:57,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:21:57,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 31 [2022-11-16 11:21:57,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268094411] [2022-11-16 11:21:57,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:57,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:21:57,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:21:57,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:21:57,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:21:57,421 INFO L87 Difference]: Start difference. First operand 928 states and 1244 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)