./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/vogal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/vogal-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN --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 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- 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-6b4ec56 [2022-11-20 12:14:24,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:14:24,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:14:24,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:14:24,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:14:24,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:14:24,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:14:24,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:14:24,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:14:24,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:14:24,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:14:24,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:14:24,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:14:24,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:14:24,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:14:24,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:14:24,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:14:24,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:14:24,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:14:24,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:14:24,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:14:24,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:14:24,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:14:24,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:14:24,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:14:24,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:14:24,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:14:24,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:14:24,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:14:24,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:14:24,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:14:24,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:14:24,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:14:24,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:14:24,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:14:24,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:14:24,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:14:24,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:14:24,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:14:24,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:14:24,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:14:24,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:14:24,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:14:24,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:14:24,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:14:24,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:14:24,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:14:24,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:14:24,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:14:24,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:14:24,396 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:14:24,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:14:24,398 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:14:24,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:14:24,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:14:24,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:14:24,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:14:24,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:14:24,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:14:24,400 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:14:24,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:14:24,401 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:14:24,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:14:24,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:14:24,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:14:24,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:14:24,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:14:24,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:14:24,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:14:24,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:14:24,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:14:24,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:14:24,405 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:14:24,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:14:24,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:14:24,406 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_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2022-11-20 12:14:24,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:14:24,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:14:24,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:14:24,729 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:14:24,730 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:14:24,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loops/vogal-1.i [2022-11-20 12:14:28,314 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:14:28,655 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:14:28,656 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/sv-benchmarks/c/loops/vogal-1.i [2022-11-20 12:14:28,664 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/data/9927b6b62/e7e90eaf058a404f9e6679747673d3a0/FLAG789567b30 [2022-11-20 12:14:28,924 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/data/9927b6b62/e7e90eaf058a404f9e6679747673d3a0 [2022-11-20 12:14:28,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:14:28,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:14:28,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:14:28,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:14:28,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:14:28,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:14:28" (1/1) ... [2022-11-20 12:14:28,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635844b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:28, skipping insertion in model container [2022-11-20 12:14:28,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:14:28" (1/1) ... [2022-11-20 12:14:28,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:14:28,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:14:29,154 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-11-20 12:14:29,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:14:29,193 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:14:29,209 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-11-20 12:14:29,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:14:29,243 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:14:29,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29 WrapperNode [2022-11-20 12:14:29,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:14:29,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:14:29,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:14:29,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:14:29,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (1/1) ... [2022-11-20 12:14:29,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (1/1) ... [2022-11-20 12:14:29,302 INFO L138 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 133 [2022-11-20 12:14:29,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:14:29,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:14:29,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:14:29,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:14:29,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (1/1) ... [2022-11-20 12:14:29,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (1/1) ... [2022-11-20 12:14:29,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (1/1) ... [2022-11-20 12:14:29,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (1/1) ... [2022-11-20 12:14:29,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (1/1) ... [2022-11-20 12:14:29,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (1/1) ... [2022-11-20 12:14:29,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (1/1) ... [2022-11-20 12:14:29,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (1/1) ... [2022-11-20 12:14:29,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:14:29,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:14:29,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:14:29,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:14:29,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (1/1) ... [2022-11-20 12:14:29,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:14:29,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:29,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:14:29,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:14:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:14:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:14:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:14:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:14:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:14:29,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:14:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:14:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:14:29,525 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:14:29,528 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:14:29,784 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:14:29,792 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:14:29,792 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 12:14:29,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:14:29 BoogieIcfgContainer [2022-11-20 12:14:29,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:14:29,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:14:29,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:14:29,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:14:29,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:14:28" (1/3) ... [2022-11-20 12:14:29,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61171871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:14:29, skipping insertion in model container [2022-11-20 12:14:29,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:29" (2/3) ... [2022-11-20 12:14:29,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61171871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:14:29, skipping insertion in model container [2022-11-20 12:14:29,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:14:29" (3/3) ... [2022-11-20 12:14:29,806 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-11-20 12:14:29,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:14:29,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:14:29,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:14:29,897 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;@6a0e224a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:14:29,897 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:14:29,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 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) [2022-11-20 12:14:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:14:29,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:29,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:29,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:29,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:29,919 INFO L85 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2022-11-20 12:14:29,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:29,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906920600] [2022-11-20 12:14:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:29,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:30,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906920600] [2022-11-20 12:14:30,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906920600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:30,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:30,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:14:30,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084444511] [2022-11-20 12:14:30,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:30,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:14:30,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:30,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:14:30,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:14:30,215 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2022-11-20 12:14:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:30,259 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2022-11-20 12:14:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:14:30,262 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 [2022-11-20 12:14:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:30,273 INFO L225 Difference]: With dead ends: 54 [2022-11-20 12:14:30,273 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 12:14:30,277 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 [2022-11-20 12:14:30,282 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2022-11-20 12:14:30,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:14:30,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 12:14:30,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 12:14:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2022-11-20 12:14:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-20 12:14:30,335 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2022-11-20 12:14:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:30,336 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-20 12:14:30,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2022-11-20 12:14:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-20 12:14:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 12:14:30,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:30,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:30,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:14:30,339 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:30,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2022-11-20 12:14:30,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:30,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690801253] [2022-11-20 12:14:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:30,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:30,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:30,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690801253] [2022-11-20 12:14:30,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690801253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:30,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:30,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:14:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305752095] [2022-11-20 12:14:30,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:30,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:14:30,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:14:30,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:14:30,574 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:30,661 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-11-20 12:14:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:14:30,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 12:14:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:30,676 INFO L225 Difference]: With dead ends: 64 [2022-11-20 12:14:30,676 INFO L226 Difference]: Without dead ends: 43 [2022-11-20 12:14:30,677 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 [2022-11-20 12:14:30,678 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 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 [2022-11-20 12:14:30,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:14:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-20 12:14:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2022-11-20 12:14:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-11-20 12:14:30,687 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2022-11-20 12:14:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:30,687 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-11-20 12:14:30,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:30,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-11-20 12:14:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:14:30,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:30,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:30,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:14:30,690 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:30,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:30,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2094228111, now seen corresponding path program 1 times [2022-11-20 12:14:30,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:30,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494070197] [2022-11-20 12:14:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:30,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:31,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:31,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494070197] [2022-11-20 12:14:31,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494070197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:31,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387258236] [2022-11-20 12:14:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:31,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:31,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:31,064 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:31,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:14:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:31,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 12:14:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:14:31,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:14:31,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387258236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:31,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:14:31,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-11-20 12:14:31,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442756407] [2022-11-20 12:14:31,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:31,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:14:31,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:31,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:14:31,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:14:31,410 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:31,469 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-11-20 12:14:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:14:31,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2022-11-20 12:14:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:31,471 INFO L225 Difference]: With dead ends: 52 [2022-11-20 12:14:31,471 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 12:14:31,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:14:31,474 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:31,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 124 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:14:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 12:14:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-11-20 12:14:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 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) [2022-11-20 12:14:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2022-11-20 12:14:31,484 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2022-11-20 12:14:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:31,484 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2022-11-20 12:14:31,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2022-11-20 12:14:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 12:14:31,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:31,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:31,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:31,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:31,694 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:31,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2138024952, now seen corresponding path program 1 times [2022-11-20 12:14:31,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:31,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130145254] [2022-11-20 12:14:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:31,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:14:31,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:31,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130145254] [2022-11-20 12:14:31,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130145254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:31,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024478655] [2022-11-20 12:14:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:31,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:31,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:31,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:31,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:14:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:31,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:14:31,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:14:32,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:14:32,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024478655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:32,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:14:32,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-20 12:14:32,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810119930] [2022-11-20 12:14:32,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:32,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:14:32,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:32,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:14:32,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:14:32,064 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:32,171 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-11-20 12:14:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:14:32,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 12:14:32,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:32,173 INFO L225 Difference]: With dead ends: 97 [2022-11-20 12:14:32,173 INFO L226 Difference]: Without dead ends: 69 [2022-11-20 12:14:32,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:14:32,175 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:32,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 73 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:14:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-20 12:14:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2022-11-20 12:14:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 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) [2022-11-20 12:14:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-11-20 12:14:32,208 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 23 [2022-11-20 12:14:32,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:32,208 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-11-20 12:14:32,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:32,209 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-11-20 12:14:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 12:14:32,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:32,215 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:32,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 12:14:32,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-20 12:14:32,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:32,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1093571635, now seen corresponding path program 1 times [2022-11-20 12:14:32,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:32,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347283543] [2022-11-20 12:14:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:32,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:14:32,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:32,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347283543] [2022-11-20 12:14:32,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347283543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:32,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545842139] [2022-11-20 12:14:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:32,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:32,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:32,659 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:32,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:14:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:32,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:14:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:32,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 12:14:32,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:14:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:14:32,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:14:33,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545842139] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:33,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:14:33,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 8] total 12 [2022-11-20 12:14:33,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375171411] [2022-11-20 12:14:33,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:33,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:14:33,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:33,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:14:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:14:33,241 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:33,479 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2022-11-20 12:14:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:14:33,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 12:14:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:33,481 INFO L225 Difference]: With dead ends: 61 [2022-11-20 12:14:33,481 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 12:14:33,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:14:33,483 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:33,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 107 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:14:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 12:14:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-20 12:14:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 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) [2022-11-20 12:14:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-11-20 12:14:33,491 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-11-20 12:14:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:33,492 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-11-20 12:14:33,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-11-20 12:14:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 12:14:33,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:33,494 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:33,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:33,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:33,701 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:33,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1875229501, now seen corresponding path program 1 times [2022-11-20 12:14:33,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:33,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792745190] [2022-11-20 12:14:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:33,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:14:33,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:33,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792745190] [2022-11-20 12:14:33,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792745190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:33,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335156285] [2022-11-20 12:14:33,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:33,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:33,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:33,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:33,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:14:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:33,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:14:33,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:33,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 12:14:34,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-20 12:14:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:14:34,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:14:34,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335156285] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:34,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:14:34,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 8] total 12 [2022-11-20 12:14:34,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816654638] [2022-11-20 12:14:34,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:34,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:14:34,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:34,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:14:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:14:34,323 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:34,575 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-11-20 12:14:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:14:34,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 12:14:34,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:34,577 INFO L225 Difference]: With dead ends: 66 [2022-11-20 12:14:34,579 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 12:14:34,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:14:34,581 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:34,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 68 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:14:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 12:14:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2022-11-20 12:14:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-11-20 12:14:34,603 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2022-11-20 12:14:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:34,604 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-11-20 12:14:34,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-11-20 12:14:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 12:14:34,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:34,606 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:34,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:34,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:34,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:34,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1536847246, now seen corresponding path program 1 times [2022-11-20 12:14:34,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:34,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61824182] [2022-11-20 12:14:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:34,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:14:34,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:34,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61824182] [2022-11-20 12:14:34,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61824182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:34,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067485863] [2022-11-20 12:14:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:34,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:34,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:34,919 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:34,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:14:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:35,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:14:35,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:14:35,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:14:35,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067485863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:35,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:35,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2022-11-20 12:14:35,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265265934] [2022-11-20 12:14:35,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:35,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:14:35,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:35,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:14:35,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:14:35,117 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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) [2022-11-20 12:14:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:35,473 INFO L93 Difference]: Finished difference Result 220 states and 289 transitions. [2022-11-20 12:14:35,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:14:35,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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 26 [2022-11-20 12:14:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:35,476 INFO L225 Difference]: With dead ends: 220 [2022-11-20 12:14:35,476 INFO L226 Difference]: Without dead ends: 183 [2022-11-20 12:14:35,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:14:35,478 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 203 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:35,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 185 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:14:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-20 12:14:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 48. [2022-11-20 12:14:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-11-20 12:14:35,495 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 26 [2022-11-20 12:14:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:35,495 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-11-20 12:14:35,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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) [2022-11-20 12:14:35,496 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-11-20 12:14:35,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 12:14:35,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:35,497 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:35,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:35,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 12:14:35,704 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1845688875, now seen corresponding path program 2 times [2022-11-20 12:14:35,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:35,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498278457] [2022-11-20 12:14:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:35,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:14:35,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:35,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498278457] [2022-11-20 12:14:35,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498278457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:35,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435406370] [2022-11-20 12:14:35,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:14:35,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:35,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:35,854 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:35,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:14:35,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:14:35,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:14:35,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 12:14:35,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:14:36,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:14:36,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435406370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:36,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:36,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 10 [2022-11-20 12:14:36,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746329976] [2022-11-20 12:14:36,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:36,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:14:36,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:36,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:14:36,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:14:36,098 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:37,041 INFO L93 Difference]: Finished difference Result 390 states and 517 transitions. [2022-11-20 12:14:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 12:14:37,043 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 12:14:37,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:37,045 INFO L225 Difference]: With dead ends: 390 [2022-11-20 12:14:37,046 INFO L226 Difference]: Without dead ends: 349 [2022-11-20 12:14:37,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-11-20 12:14:37,049 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 684 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:37,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 274 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:14:37,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-20 12:14:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 52. [2022-11-20 12:14:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 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) [2022-11-20 12:14:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-11-20 12:14:37,084 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 30 [2022-11-20 12:14:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:37,086 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-11-20 12:14:37,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-11-20 12:14:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 12:14:37,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:37,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:37,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:37,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:37,297 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:37,298 INFO L85 PathProgramCache]: Analyzing trace with hash -926448804, now seen corresponding path program 1 times [2022-11-20 12:14:37,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:37,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821334927] [2022-11-20 12:14:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:37,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:14:37,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:37,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821334927] [2022-11-20 12:14:37,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821334927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:37,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722484546] [2022-11-20 12:14:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:37,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:37,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:37,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:37,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:14:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:37,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:14:37,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:14:37,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:14:37,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722484546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:37,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:14:37,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 12:14:37,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979014140] [2022-11-20 12:14:37,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:14:37,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:14:37,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:14:37,668 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:37,716 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2022-11-20 12:14:37,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:14:37,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 12:14:37,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:37,718 INFO L225 Difference]: With dead ends: 94 [2022-11-20 12:14:37,719 INFO L226 Difference]: Without dead ends: 64 [2022-11-20 12:14:37,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:14:37,722 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:37,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:14:37,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-20 12:14:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-11-20 12:14:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 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) [2022-11-20 12:14:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-11-20 12:14:37,753 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 33 [2022-11-20 12:14:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:37,754 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-11-20 12:14:37,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-11-20 12:14:37,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 12:14:37,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:37,761 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:37,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:37,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:37,969 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:37,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1399324024, now seen corresponding path program 3 times [2022-11-20 12:14:37,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:37,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372251510] [2022-11-20 12:14:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:37,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:14:38,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372251510] [2022-11-20 12:14:38,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372251510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226514617] [2022-11-20 12:14:38,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:14:38,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:38,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:38,156 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:38,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:14:38,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:14:38,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:14:38,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:14:38,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:38,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:14:38,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:38,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-20 12:14:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 12:14:38,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:39,047 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 12:14:39,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2022-11-20 12:14:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 12:14:39,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226514617] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:39,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:14:39,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 10] total 19 [2022-11-20 12:14:39,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141782830] [2022-11-20 12:14:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:39,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:14:39,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:14:39,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:14:39,052 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2022-11-20 12:14:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:39,239 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-11-20 12:14:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:14:39,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) Word has length 34 [2022-11-20 12:14:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:39,241 INFO L225 Difference]: With dead ends: 90 [2022-11-20 12:14:39,241 INFO L226 Difference]: Without dead ends: 69 [2022-11-20 12:14:39,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:14:39,242 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 85 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:39,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 83 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:14:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-20 12:14:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-11-20 12:14:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-11-20 12:14:39,263 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 34 [2022-11-20 12:14:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:39,263 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-11-20 12:14:39,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2022-11-20 12:14:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-11-20 12:14:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 12:14:39,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:39,265 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:39,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:39,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:14:39,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:39,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1076823445, now seen corresponding path program 1 times [2022-11-20 12:14:39,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:39,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444370672] [2022-11-20 12:14:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:39,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:14:39,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:39,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444370672] [2022-11-20 12:14:39,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444370672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:39,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238910106] [2022-11-20 12:14:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:39,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:39,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:39,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:39,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:14:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:39,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 12:14:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:14:39,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:14:40,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238910106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:40,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:40,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2022-11-20 12:14:40,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153844283] [2022-11-20 12:14:40,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:40,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:14:40,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:40,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:14:40,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:14:40,137 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:41,485 INFO L93 Difference]: Finished difference Result 432 states and 552 transitions. [2022-11-20 12:14:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 12:14:41,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 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 [2022-11-20 12:14:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:41,490 INFO L225 Difference]: With dead ends: 432 [2022-11-20 12:14:41,490 INFO L226 Difference]: Without dead ends: 382 [2022-11-20 12:14:41,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 12:14:41,497 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 686 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:41,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 848 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:14:41,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-20 12:14:41,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 69. [2022-11-20 12:14:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2022-11-20 12:14:41,540 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 36 [2022-11-20 12:14:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:41,540 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2022-11-20 12:14:41,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:41,540 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2022-11-20 12:14:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 12:14:41,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:41,543 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:41,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:41,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:41,750 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:41,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:41,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1408390255, now seen corresponding path program 1 times [2022-11-20 12:14:41,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:41,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217160218] [2022-11-20 12:14:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:41,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:14:41,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:41,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217160218] [2022-11-20 12:14:41,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217160218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:41,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278731584] [2022-11-20 12:14:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:41,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:41,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:41,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:41,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:14:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:42,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:14:42,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:42,400 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-20 12:14:42,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-20 12:14:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:14:42,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:42,828 INFO L321 Elim1Store]: treesize reduction 4, result has 96.6 percent of original size [2022-11-20 12:14:42,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 139 [2022-11-20 12:14:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:14:43,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278731584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:43,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2022-11-20 12:14:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014986486] [2022-11-20 12:14:43,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 12:14:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 12:14:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:14:43,653 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:45,866 INFO L93 Difference]: Finished difference Result 549 states and 725 transitions. [2022-11-20 12:14:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 12:14:45,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 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 38 [2022-11-20 12:14:45,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:45,869 INFO L225 Difference]: With dead ends: 549 [2022-11-20 12:14:45,869 INFO L226 Difference]: Without dead ends: 491 [2022-11-20 12:14:45,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 12:14:45,871 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 704 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:45,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 573 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:14:45,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-20 12:14:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 95. [2022-11-20 12:14:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 94 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) [2022-11-20 12:14:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2022-11-20 12:14:45,918 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 38 [2022-11-20 12:14:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:45,919 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2022-11-20 12:14:45,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2022-11-20 12:14:45,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 12:14:45,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:45,920 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:45,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:46,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:46,127 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:46,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1678328275, now seen corresponding path program 1 times [2022-11-20 12:14:46,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:46,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46372941] [2022-11-20 12:14:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:46,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:14:46,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:46,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46372941] [2022-11-20 12:14:46,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46372941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:46,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257215875] [2022-11-20 12:14:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:46,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:46,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:46,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:46,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:14:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:46,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 12:14:46,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:46,703 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:14:46,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-11-20 12:14:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 12:14:46,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:47,067 INFO L321 Elim1Store]: treesize reduction 11, result has 90.7 percent of original size [2022-11-20 12:14:47,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-11-20 12:14:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:14:47,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257215875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:47,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:47,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 18 [2022-11-20 12:14:47,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142717274] [2022-11-20 12:14:47,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:47,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:14:47,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:47,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:14:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:14:47,776 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:48,805 INFO L93 Difference]: Finished difference Result 313 states and 431 transitions. [2022-11-20 12:14:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 12:14:48,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-20 12:14:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:48,810 INFO L225 Difference]: With dead ends: 313 [2022-11-20 12:14:48,810 INFO L226 Difference]: Without dead ends: 241 [2022-11-20 12:14:48,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-11-20 12:14:48,814 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 229 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:48,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 294 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:14:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-20 12:14:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 127. [2022-11-20 12:14:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 126 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2022-11-20 12:14:48,886 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 40 [2022-11-20 12:14:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:48,886 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2022-11-20 12:14:48,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2022-11-20 12:14:48,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 12:14:48,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:48,890 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:48,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:49,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 12:14:49,093 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:49,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1208431142, now seen corresponding path program 2 times [2022-11-20 12:14:49,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:49,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113582707] [2022-11-20 12:14:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:49,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:14:49,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:49,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113582707] [2022-11-20 12:14:49,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113582707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:49,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736163960] [2022-11-20 12:14:49,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:14:49,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:49,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:49,706 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:49,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:14:49,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:14:49,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:14:49,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 12:14:49,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:14:50,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:14:50,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736163960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:50,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:50,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 20 [2022-11-20 12:14:50,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334197000] [2022-11-20 12:14:50,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:50,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:14:50,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:14:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:14:50,311 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:52,203 INFO L93 Difference]: Finished difference Result 537 states and 691 transitions. [2022-11-20 12:14:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 12:14:52,204 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 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 46 [2022-11-20 12:14:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:52,206 INFO L225 Difference]: With dead ends: 537 [2022-11-20 12:14:52,207 INFO L226 Difference]: Without dead ends: 531 [2022-11-20 12:14:52,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 12:14:52,214 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 544 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:52,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1137 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:14:52,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-20 12:14:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 165. [2022-11-20 12:14:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2804878048780488) internal successors, (210), 164 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2022-11-20 12:14:52,328 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 46 [2022-11-20 12:14:52,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:52,329 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2022-11-20 12:14:52,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:52,329 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2022-11-20 12:14:52,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 12:14:52,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:52,330 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:52,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:52,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:52,537 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:14:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:52,538 INFO L85 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2022-11-20 12:14:52,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:52,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528021088] [2022-11-20 12:14:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:52,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 12:14:54,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:54,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528021088] [2022-11-20 12:14:54,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528021088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:54,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78807647] [2022-11-20 12:14:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:54,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:54,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:54,735 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:54,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:14:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:54,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 12:14:54,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:01,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:15:01,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2022-11-20 12:15:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:15:01,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:04,284 INFO L321 Elim1Store]: treesize reduction 378, result has 0.3 percent of original size [2022-11-20 12:15:04,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 1 [2022-11-20 12:15:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:15:04,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78807647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:04,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:04,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 13] total 31 [2022-11-20 12:15:04,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986351064] [2022-11-20 12:15:04,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:04,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 12:15:04,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 12:15:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-11-20 12:15:04,294 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:17,416 INFO L93 Difference]: Finished difference Result 498 states and 654 transitions. [2022-11-20 12:15:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 12:15:17,417 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 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 46 [2022-11-20 12:15:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:17,419 INFO L225 Difference]: With dead ends: 498 [2022-11-20 12:15:17,419 INFO L226 Difference]: Without dead ends: 398 [2022-11-20 12:15:17,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=487, Invalid=2593, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 12:15:17,422 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 107 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:17,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 288 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 176 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-11-20 12:15:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-20 12:15:17,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 247. [2022-11-20 12:15:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.3008130081300813) internal successors, (320), 246 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 320 transitions. [2022-11-20 12:15:17,527 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 320 transitions. Word has length 46 [2022-11-20 12:15:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:17,528 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 320 transitions. [2022-11-20 12:15:17,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 320 transitions. [2022-11-20 12:15:17,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 12:15:17,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:17,529 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:17,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:17,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 12:15:17,736 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:15:17,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:17,736 INFO L85 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2022-11-20 12:15:17,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:17,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083876869] [2022-11-20 12:15:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:17,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 12:15:19,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:19,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083876869] [2022-11-20 12:15:19,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083876869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:19,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487411706] [2022-11-20 12:15:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:19,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:19,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:19,335 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:19,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:15:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:19,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 12:15:19,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:23,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:15:23,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-11-20 12:15:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:15:25,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:28,230 INFO L321 Elim1Store]: treesize reduction 378, result has 0.3 percent of original size [2022-11-20 12:15:28,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 1 [2022-11-20 12:15:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:15:28,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487411706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:28,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:28,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 13] total 31 [2022-11-20 12:15:28,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825106927] [2022-11-20 12:15:28,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:28,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 12:15:28,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:28,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 12:15:28,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-11-20 12:15:28,238 INFO L87 Difference]: Start difference. First operand 247 states and 320 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:37,925 WARN L233 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:15:39,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:39,610 INFO L93 Difference]: Finished difference Result 523 states and 699 transitions. [2022-11-20 12:15:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 12:15:39,612 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 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 46 [2022-11-20 12:15:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:39,615 INFO L225 Difference]: With dead ends: 523 [2022-11-20 12:15:39,615 INFO L226 Difference]: Without dead ends: 483 [2022-11-20 12:15:39,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=700, Invalid=2722, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 12:15:39,618 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 220 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:39,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 230 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 241 Invalid, 0 Unknown, 285 Unchecked, 0.4s Time] [2022-11-20 12:15:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-20 12:15:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 377. [2022-11-20 12:15:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.300531914893617) internal successors, (489), 376 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 489 transitions. [2022-11-20 12:15:39,794 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 489 transitions. Word has length 46 [2022-11-20 12:15:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:39,794 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 489 transitions. [2022-11-20 12:15:39,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 489 transitions. [2022-11-20 12:15:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 12:15:39,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:39,797 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:39,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:40,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 12:15:40,003 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:15:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash -404220840, now seen corresponding path program 1 times [2022-11-20 12:15:40,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:40,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037423366] [2022-11-20 12:15:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:40,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:15:42,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:42,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037423366] [2022-11-20 12:15:42,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037423366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:42,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565940565] [2022-11-20 12:15:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:42,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:42,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:42,854 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:42,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:15:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 12:15:42,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:43,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:43,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:15:43,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:15:43,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-11-20 12:15:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 12:15:43,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:44,301 INFO L321 Elim1Store]: treesize reduction 26, result has 68.3 percent of original size [2022-11-20 12:15:44,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 63 [2022-11-20 12:15:44,405 INFO L321 Elim1Store]: treesize reduction 25, result has 72.5 percent of original size [2022-11-20 12:15:44,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 73 [2022-11-20 12:15:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:15:44,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565940565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:44,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:44,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 27 [2022-11-20 12:15:44,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608880800] [2022-11-20 12:15:44,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:44,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 12:15:44,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:44,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 12:15:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-11-20 12:15:44,634 INFO L87 Difference]: Start difference. First operand 377 states and 489 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 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) [2022-11-20 12:15:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:46,319 INFO L93 Difference]: Finished difference Result 1025 states and 1344 transitions. [2022-11-20 12:15:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 12:15:46,320 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-20 12:15:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:46,323 INFO L225 Difference]: With dead ends: 1025 [2022-11-20 12:15:46,324 INFO L226 Difference]: Without dead ends: 599 [2022-11-20 12:15:46,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:15:46,326 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 179 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:46,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 264 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 303 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2022-11-20 12:15:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-20 12:15:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 532. [2022-11-20 12:15:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.2937853107344632) internal successors, (687), 531 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 687 transitions. [2022-11-20 12:15:46,558 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 687 transitions. Word has length 46 [2022-11-20 12:15:46,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:46,558 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 687 transitions. [2022-11-20 12:15:46,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 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) [2022-11-20 12:15:46,559 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 687 transitions. [2022-11-20 12:15:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 12:15:46,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:46,561 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:46,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-20 12:15:46,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:15:46,765 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:15:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:46,765 INFO L85 PathProgramCache]: Analyzing trace with hash -661577384, now seen corresponding path program 1 times [2022-11-20 12:15:46,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:46,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673825616] [2022-11-20 12:15:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:46,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:15:49,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:49,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673825616] [2022-11-20 12:15:49,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673825616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:49,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150599942] [2022-11-20 12:15:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:49,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:49,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:49,330 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:49,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 12:15:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:49,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 12:15:49,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:49,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:49,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:15:49,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:15:49,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-11-20 12:15:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:15:49,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:50,711 INFO L321 Elim1Store]: treesize reduction 17, result has 81.3 percent of original size [2022-11-20 12:15:50,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-11-20 12:15:50,860 INFO L321 Elim1Store]: treesize reduction 17, result has 79.3 percent of original size [2022-11-20 12:15:50,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 72 [2022-11-20 12:15:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:15:50,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150599942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:50,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:50,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-11-20 12:15:50,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955121526] [2022-11-20 12:15:50,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:50,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 12:15:50,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 12:15:50,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:15:50,985 INFO L87 Difference]: Start difference. First operand 532 states and 687 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 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) [2022-11-20 12:15:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:52,991 INFO L93 Difference]: Finished difference Result 785 states and 1012 transitions. [2022-11-20 12:15:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 12:15:52,992 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 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 46 [2022-11-20 12:15:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:52,994 INFO L225 Difference]: With dead ends: 785 [2022-11-20 12:15:52,995 INFO L226 Difference]: Without dead ends: 589 [2022-11-20 12:15:52,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 12:15:52,996 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 257 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:52,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 189 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 303 Invalid, 0 Unknown, 90 Unchecked, 0.5s Time] [2022-11-20 12:15:52,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-11-20 12:15:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 361. [2022-11-20 12:15:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.288888888888889) internal successors, (464), 360 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 464 transitions. [2022-11-20 12:15:53,239 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 464 transitions. Word has length 46 [2022-11-20 12:15:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:53,239 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 464 transitions. [2022-11-20 12:15:53,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 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) [2022-11-20 12:15:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 464 transitions. [2022-11-20 12:15:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 12:15:53,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:53,241 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:53,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:53,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:15:53,448 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:15:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:53,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1978872450, now seen corresponding path program 1 times [2022-11-20 12:15:53,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:53,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890595305] [2022-11-20 12:15:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:53,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 12:15:53,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:53,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890595305] [2022-11-20 12:15:53,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890595305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:53,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320264513] [2022-11-20 12:15:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:53,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:53,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:53,772 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:53,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 12:15:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:53,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:15:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 12:15:54,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 12:15:54,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320264513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:54,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:54,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-11-20 12:15:54,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73509496] [2022-11-20 12:15:54,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:54,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:15:54,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:54,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:15:54,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:15:54,114 INFO L87 Difference]: Start difference. First operand 361 states and 464 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:54,712 INFO L93 Difference]: Finished difference Result 832 states and 1064 transitions. [2022-11-20 12:15:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:15:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-20 12:15:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:54,716 INFO L225 Difference]: With dead ends: 832 [2022-11-20 12:15:54,716 INFO L226 Difference]: Without dead ends: 506 [2022-11-20 12:15:54,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:15:54,718 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 200 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:54,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 188 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:15:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-20 12:15:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2022-11-20 12:15:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.2786458333333333) internal successors, (491), 384 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 491 transitions. [2022-11-20 12:15:54,972 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 491 transitions. Word has length 55 [2022-11-20 12:15:54,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:54,972 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 491 transitions. [2022-11-20 12:15:54,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:54,973 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 491 transitions. [2022-11-20 12:15:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 12:15:54,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:54,974 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:54,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:55,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:55,181 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:15:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:55,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1403496468, now seen corresponding path program 2 times [2022-11-20 12:15:55,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:55,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024624107] [2022-11-20 12:15:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:55,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 12:15:56,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:56,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024624107] [2022-11-20 12:15:56,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024624107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:56,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53166381] [2022-11-20 12:15:56,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:15:56,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:56,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:56,426 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:56,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 12:15:56,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:15:56,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:15:56,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 12:15:56,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:02,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:16:02,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-11-20 12:16:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 12:16:10,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 12:16:12,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53166381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:12,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:12,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-11-20 12:16:12,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013504158] [2022-11-20 12:16:12,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:12,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:16:12,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:16:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:16:12,974 INFO L87 Difference]: Start difference. First operand 385 states and 491 transitions. Second operand has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:25,031 INFO L93 Difference]: Finished difference Result 705 states and 916 transitions. [2022-11-20 12:16:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-20 12:16:25,032 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-20 12:16:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:25,034 INFO L225 Difference]: With dead ends: 705 [2022-11-20 12:16:25,034 INFO L226 Difference]: Without dead ends: 615 [2022-11-20 12:16:25,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=994, Invalid=7196, Unknown=0, NotChecked=0, Total=8190 [2022-11-20 12:16:25,038 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 286 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:25,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 351 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 416 Invalid, 0 Unknown, 312 Unchecked, 0.6s Time] [2022-11-20 12:16:25,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-20 12:16:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 467. [2022-11-20 12:16:25,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.2918454935622317) internal successors, (602), 466 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 602 transitions. [2022-11-20 12:16:25,261 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 602 transitions. Word has length 56 [2022-11-20 12:16:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:25,261 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 602 transitions. [2022-11-20 12:16:25,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 602 transitions. [2022-11-20 12:16:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 12:16:25,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:25,263 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:25,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:25,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:25,468 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:16:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:25,469 INFO L85 PathProgramCache]: Analyzing trace with hash -41484349, now seen corresponding path program 3 times [2022-11-20 12:16:25,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:25,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947871329] [2022-11-20 12:16:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:25,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 12:16:28,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947871329] [2022-11-20 12:16:28,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947871329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889877877] [2022-11-20 12:16:28,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:16:28,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:28,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:28,993 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:28,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 12:16:29,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 12:16:29,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:16:29,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 12:16:29,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:29,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-20 12:16:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 12:16:29,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:29,731 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 12:16:29,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-11-20 12:16:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 12:16:29,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889877877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:29,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:29,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 9] total 33 [2022-11-20 12:16:29,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349189597] [2022-11-20 12:16:29,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:29,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 12:16:29,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:29,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 12:16:29,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 12:16:29,798 INFO L87 Difference]: Start difference. First operand 467 states and 602 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:32,829 INFO L93 Difference]: Finished difference Result 1553 states and 2055 transitions. [2022-11-20 12:16:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 12:16:32,830 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 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 57 [2022-11-20 12:16:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:32,834 INFO L225 Difference]: With dead ends: 1553 [2022-11-20 12:16:32,834 INFO L226 Difference]: Without dead ends: 1549 [2022-11-20 12:16:32,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=579, Invalid=2727, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 12:16:32,836 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 817 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:32,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 358 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:16:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2022-11-20 12:16:33,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 485. [2022-11-20 12:16:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.2789256198347108) internal successors, (619), 484 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 619 transitions. [2022-11-20 12:16:33,118 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 619 transitions. Word has length 57 [2022-11-20 12:16:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:33,119 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 619 transitions. [2022-11-20 12:16:33,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 619 transitions. [2022-11-20 12:16:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 12:16:33,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:33,124 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:33,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:33,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:33,331 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:16:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:33,331 INFO L85 PathProgramCache]: Analyzing trace with hash -793949111, now seen corresponding path program 4 times [2022-11-20 12:16:33,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:33,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674803011] [2022-11-20 12:16:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:33,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 12:16:33,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674803011] [2022-11-20 12:16:33,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674803011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484997828] [2022-11-20 12:16:33,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:16:33,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:33,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:33,579 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:33,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 12:16:33,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:16:33,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:16:33,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:16:33,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 12:16:33,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 12:16:34,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484997828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:34,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:34,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 23 [2022-11-20 12:16:34,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916459709] [2022-11-20 12:16:34,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:34,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 12:16:34,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:34,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 12:16:34,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:16:34,184 INFO L87 Difference]: Start difference. First operand 485 states and 619 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) [2022-11-20 12:16:44,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:44,095 INFO L93 Difference]: Finished difference Result 4675 states and 6330 transitions. [2022-11-20 12:16:44,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-20 12:16:44,095 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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 58 [2022-11-20 12:16:44,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:44,109 INFO L225 Difference]: With dead ends: 4675 [2022-11-20 12:16:44,109 INFO L226 Difference]: Without dead ends: 4227 [2022-11-20 12:16:44,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4131 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1811, Invalid=9109, Unknown=0, NotChecked=0, Total=10920 [2022-11-20 12:16:44,114 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1452 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:44,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1452 Valid, 700 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:16:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2022-11-20 12:16:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 1096. [2022-11-20 12:16:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 1.2767123287671234) internal successors, (1398), 1095 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1398 transitions. [2022-11-20 12:16:44,879 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1398 transitions. Word has length 58 [2022-11-20 12:16:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:44,879 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1398 transitions. [2022-11-20 12:16:44,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) [2022-11-20 12:16:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1398 transitions. [2022-11-20 12:16:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 12:16:44,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:44,882 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:44,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:45,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:45,088 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:16:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash 168090165, now seen corresponding path program 5 times [2022-11-20 12:16:45,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:45,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304974102] [2022-11-20 12:16:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:45,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 12:16:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:45,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304974102] [2022-11-20 12:16:45,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304974102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:45,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227263190] [2022-11-20 12:16:45,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:16:45,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:45,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:45,439 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:45,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 12:16:47,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-20 12:16:47,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:16:47,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-20 12:16:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:47,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:16:48,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-20 12:16:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 12:16:48,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 24 proven. 35 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 12:16:49,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227263190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:49,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:49,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 23, 15] total 45 [2022-11-20 12:16:49,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514261434] [2022-11-20 12:16:49,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:49,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 12:16:49,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:49,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 12:16:49,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 12:16:49,431 INFO L87 Difference]: Start difference. First operand 1096 states and 1398 transitions. Second operand has 45 states, 45 states have (on average 3.022222222222222) internal successors, (136), 45 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:17,960 INFO L93 Difference]: Finished difference Result 26716 states and 36928 transitions. [2022-11-20 12:18:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 553 states. [2022-11-20 12:18:17,960 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.022222222222222) internal successors, (136), 45 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-20 12:18:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:18,029 INFO L225 Difference]: With dead ends: 26716 [2022-11-20 12:18:18,029 INFO L226 Difference]: Without dead ends: 25143 [2022-11-20 12:18:18,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 574 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147487 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=14450, Invalid=316750, Unknown=0, NotChecked=0, Total=331200 [2022-11-20 12:18:18,071 INFO L413 NwaCegarLoop]: 970 mSDtfsCounter, 4427 mSDsluCounter, 15625 mSDsCounter, 0 mSdLazyCounter, 21980 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4427 SdHoareTripleChecker+Valid, 16595 SdHoareTripleChecker+Invalid, 22479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 21980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:18,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4427 Valid, 16595 Invalid, 22479 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [499 Valid, 21980 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2022-11-20 12:18:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25143 states. [2022-11-20 12:18:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25143 to 1816. [2022-11-20 12:18:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 1.2826446280991735) internal successors, (2328), 1815 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2328 transitions. [2022-11-20 12:18:19,838 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2328 transitions. Word has length 66 [2022-11-20 12:18:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:19,839 INFO L495 AbstractCegarLoop]: Abstraction has 1816 states and 2328 transitions. [2022-11-20 12:18:19,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.022222222222222) internal successors, (136), 45 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:19,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2328 transitions. [2022-11-20 12:18:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 12:18:19,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:19,843 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:19,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 12:18:20,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 12:18:20,050 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:20,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1786130607, now seen corresponding path program 6 times [2022-11-20 12:18:20,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:20,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732374700] [2022-11-20 12:18:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:20,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 12:18:22,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732374700] [2022-11-20 12:18:22,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732374700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:18:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578088775] [2022-11-20 12:18:22,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:18:22,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:18:22,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:18:22,836 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:18:22,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 12:18:23,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-20 12:18:23,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:18:23,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 12:18:23,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:18:23,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:18:23,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:18:23,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:18:23,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 13 [2022-11-20 12:18:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 12:18:23,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:18:24,320 INFO L321 Elim1Store]: treesize reduction 60, result has 50.8 percent of original size [2022-11-20 12:18:24,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 87 [2022-11-20 12:18:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 12:18:24,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578088775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:18:24,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:18:24,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 37 [2022-11-20 12:18:24,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077084387] [2022-11-20 12:18:24,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:18:24,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 12:18:24,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:24,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 12:18:24,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:18:24,479 INFO L87 Difference]: Start difference. First operand 1816 states and 2328 transitions. Second operand has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 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) [2022-11-20 12:18:32,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:32,843 INFO L93 Difference]: Finished difference Result 4754 states and 6325 transitions. [2022-11-20 12:18:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 12:18:32,844 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 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) Word has length 67 [2022-11-20 12:18:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:32,850 INFO L225 Difference]: With dead ends: 4754 [2022-11-20 12:18:32,851 INFO L226 Difference]: Without dead ends: 4440 [2022-11-20 12:18:32,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1124, Invalid=6186, Unknown=0, NotChecked=0, Total=7310 [2022-11-20 12:18:32,854 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 742 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:32,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 637 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:18:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2022-11-20 12:18:35,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3183. [2022-11-20 12:18:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 3182 states have (on average 1.2900691389063481) internal successors, (4105), 3182 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4105 transitions. [2022-11-20 12:18:35,201 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4105 transitions. Word has length 67 [2022-11-20 12:18:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:35,201 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 4105 transitions. [2022-11-20 12:18:35,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 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) [2022-11-20 12:18:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4105 transitions. [2022-11-20 12:18:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 12:18:35,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:35,207 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:35,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 12:18:35,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 12:18:35,414 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash -436746483, now seen corresponding path program 7 times [2022-11-20 12:18:35,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:35,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526231822] [2022-11-20 12:18:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:35,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 12:18:38,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526231822] [2022-11-20 12:18:38,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526231822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:18:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487913709] [2022-11-20 12:18:38,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:18:38,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:18:38,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:18:38,543 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:18:38,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 12:18:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:38,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 12:18:38,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:18:39,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:18:39,528 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-11-20 12:18:39,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-11-20 12:18:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 56 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 12:18:39,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:18:40,384 INFO L321 Elim1Store]: treesize reduction 26, result has 68.3 percent of original size [2022-11-20 12:18:40,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 63 [2022-11-20 12:18:40,479 INFO L321 Elim1Store]: treesize reduction 25, result has 72.5 percent of original size [2022-11-20 12:18:40,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 73 [2022-11-20 12:18:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 12:18:40,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487913709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:18:40,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:18:40,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 44 [2022-11-20 12:18:40,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134033877] [2022-11-20 12:18:40,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:18:40,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 12:18:40,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:40,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 12:18:40,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1642, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 12:18:40,824 INFO L87 Difference]: Start difference. First operand 3183 states and 4105 transitions. Second operand has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:49,963 INFO L93 Difference]: Finished difference Result 5775 states and 7477 transitions. [2022-11-20 12:18:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-20 12:18:49,964 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 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 67 [2022-11-20 12:18:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:49,969 INFO L225 Difference]: With dead ends: 5775 [2022-11-20 12:18:49,970 INFO L226 Difference]: Without dead ends: 3884 [2022-11-20 12:18:49,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 112 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=875, Invalid=5287, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 12:18:49,974 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 725 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:49,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 888 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1567 Invalid, 0 Unknown, 167 Unchecked, 1.4s Time] [2022-11-20 12:18:49,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2022-11-20 12:18:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 2879. [2022-11-20 12:18:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 1.2564280750521195) internal successors, (3616), 2878 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 3616 transitions. [2022-11-20 12:18:52,143 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 3616 transitions. Word has length 67 [2022-11-20 12:18:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:52,143 INFO L495 AbstractCegarLoop]: Abstraction has 2879 states and 3616 transitions. [2022-11-20 12:18:52,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:18:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 3616 transitions. [2022-11-20 12:18:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 12:18:52,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:52,149 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:52,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 12:18:52,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 12:18:52,355 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash 6687953, now seen corresponding path program 8 times [2022-11-20 12:18:52,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:52,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826587390] [2022-11-20 12:18:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:52,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:18:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 12:18:55,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826587390] [2022-11-20 12:18:55,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826587390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:18:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254296578] [2022-11-20 12:18:55,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:18:55,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:18:55,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:18:55,201 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:18:55,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 12:18:55,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:18:55,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:18:55,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 12:18:55,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:18:55,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:18:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:18:55,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:18:55,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 14 [2022-11-20 12:18:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 12:18:55,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:18:56,511 INFO L321 Elim1Store]: treesize reduction 13, result has 89.3 percent of original size [2022-11-20 12:18:56,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 138 [2022-11-20 12:18:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 12:18:57,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254296578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:18:57,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:18:57,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 12] total 35 [2022-11-20 12:18:57,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989170939] [2022-11-20 12:18:57,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:18:57,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:18:57,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:57,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:18:57,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:18:57,080 INFO L87 Difference]: Start difference. First operand 2879 states and 3616 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:03,386 INFO L93 Difference]: Finished difference Result 3739 states and 4711 transitions. [2022-11-20 12:19:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 12:19:03,386 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 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 67 [2022-11-20 12:19:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:03,390 INFO L225 Difference]: With dead ends: 3739 [2022-11-20 12:19:03,391 INFO L226 Difference]: Without dead ends: 3471 [2022-11-20 12:19:03,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=710, Invalid=3982, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 12:19:03,393 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 480 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:03,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 522 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:19:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2022-11-20 12:19:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 2840. [2022-11-20 12:19:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.2550193730186685) internal successors, (3563), 2839 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 3563 transitions. [2022-11-20 12:19:05,452 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 3563 transitions. Word has length 67 [2022-11-20 12:19:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:05,453 INFO L495 AbstractCegarLoop]: Abstraction has 2840 states and 3563 transitions. [2022-11-20 12:19:05,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:05,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 3563 transitions. [2022-11-20 12:19:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 12:19:05,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:05,457 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:05,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 12:19:05,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 12:19:05,663 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:05,664 INFO L85 PathProgramCache]: Analyzing trace with hash -415204979, now seen corresponding path program 9 times [2022-11-20 12:19:05,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:05,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095371520] [2022-11-20 12:19:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:05,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 12:19:08,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:08,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095371520] [2022-11-20 12:19:08,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095371520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:19:08,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847614224] [2022-11-20 12:19:08,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:19:08,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:08,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:19:08,872 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:19:08,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 12:19:09,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 12:19:09,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:19:09,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 12:19:09,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:19:09,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 12:19:09,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:19:09,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:19:09,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:19:09,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:19:09,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2022-11-20 12:19:09,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 12:19:10,751 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:19:10,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2022-11-20 12:19:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 54 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 12:19:10,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:19:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 12:19:12,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847614224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:19:12,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:19:12,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 17] total 53 [2022-11-20 12:19:12,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086162405] [2022-11-20 12:19:12,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:19:12,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 12:19:12,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:12,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 12:19:12,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 12:19:12,381 INFO L87 Difference]: Start difference. First operand 2840 states and 3563 transitions. Second operand has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:28,589 INFO L93 Difference]: Finished difference Result 4513 states and 5727 transitions. [2022-11-20 12:19:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 12:19:28,589 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 12:19:28,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:28,594 INFO L225 Difference]: With dead ends: 4513 [2022-11-20 12:19:28,594 INFO L226 Difference]: Without dead ends: 3796 [2022-11-20 12:19:28,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4970 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=2236, Invalid=13264, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 12:19:28,598 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1052 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:28,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 658 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 12:19:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2022-11-20 12:19:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 2780. [2022-11-20 12:19:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2779 states have (on average 1.2558474271320619) internal successors, (3490), 2779 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 3490 transitions. [2022-11-20 12:19:30,757 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 3490 transitions. Word has length 67 [2022-11-20 12:19:30,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:30,757 INFO L495 AbstractCegarLoop]: Abstraction has 2780 states and 3490 transitions. [2022-11-20 12:19:30,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:30,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 3490 transitions. [2022-11-20 12:19:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-20 12:19:30,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:30,760 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:30,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 12:19:30,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:30,961 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash -100514461, now seen corresponding path program 10 times [2022-11-20 12:19:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:30,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207713279] [2022-11-20 12:19:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-20 12:19:31,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:31,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207713279] [2022-11-20 12:19:31,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207713279] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:19:31,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692617960] [2022-11-20 12:19:31,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:19:31,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:31,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:19:31,999 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:19:32,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 12:19:32,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:19:32,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:19:32,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 12:19:32,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:19:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 68 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 12:19:32,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:19:33,113 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 12:19:33,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2022-11-20 12:19:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-20 12:19:33,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692617960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:19:33,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:19:33,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 11] total 30 [2022-11-20 12:19:33,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328323883] [2022-11-20 12:19:33,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:19:33,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 12:19:33,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:33,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 12:19:33,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-11-20 12:19:33,185 INFO L87 Difference]: Start difference. First operand 2780 states and 3490 transitions. Second operand has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:36,868 INFO L93 Difference]: Finished difference Result 3878 states and 4887 transitions. [2022-11-20 12:19:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:19:36,869 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 0 states have call successors, (0), 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 77 [2022-11-20 12:19:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:36,872 INFO L225 Difference]: With dead ends: 3878 [2022-11-20 12:19:36,872 INFO L226 Difference]: Without dead ends: 3422 [2022-11-20 12:19:36,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 12:19:36,873 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 290 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:36,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 657 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 809 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-11-20 12:19:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2022-11-20 12:19:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2734. [2022-11-20 12:19:38,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 1.2568605927552141) internal successors, (3435), 2733 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3435 transitions. [2022-11-20 12:19:38,973 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 3435 transitions. Word has length 77 [2022-11-20 12:19:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:38,973 INFO L495 AbstractCegarLoop]: Abstraction has 2734 states and 3435 transitions. [2022-11-20 12:19:38,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:38,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 3435 transitions. [2022-11-20 12:19:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 12:19:38,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:38,977 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:38,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 12:19:39,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 12:19:39,178 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:39,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1514679456, now seen corresponding path program 11 times [2022-11-20 12:19:39,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:39,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728620508] [2022-11-20 12:19:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:39,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-20 12:19:39,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:39,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728620508] [2022-11-20 12:19:39,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728620508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:19:39,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778432755] [2022-11-20 12:19:39,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:19:39,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:39,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:19:39,558 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:19:39,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 12:19:44,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 12:19:44,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:19:44,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 12:19:44,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:19:44,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:19:44,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:19:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-20 12:19:44,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:19:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 64 proven. 25 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-20 12:19:45,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778432755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:19:45,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:19:45,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 34 [2022-11-20 12:19:45,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121961817] [2022-11-20 12:19:45,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:19:45,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 12:19:45,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:45,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 12:19:45,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 12:19:45,031 INFO L87 Difference]: Start difference. First operand 2734 states and 3435 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:51,300 INFO L93 Difference]: Finished difference Result 6154 states and 7801 transitions. [2022-11-20 12:19:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 12:19:51,300 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-20 12:19:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:51,305 INFO L225 Difference]: With dead ends: 6154 [2022-11-20 12:19:51,305 INFO L226 Difference]: Without dead ends: 4136 [2022-11-20 12:19:51,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=467, Invalid=4225, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 12:19:51,308 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1052 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:51,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 1998 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 12:19:51,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2022-11-20 12:19:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 1512. [2022-11-20 12:19:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 1.2097948378557246) internal successors, (1828), 1511 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1828 transitions. [2022-11-20 12:19:52,578 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1828 transitions. Word has length 78 [2022-11-20 12:19:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:52,578 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 1828 transitions. [2022-11-20 12:19:52,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1828 transitions. [2022-11-20 12:19:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 12:19:52,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:52,582 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:52,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 12:19:52,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 12:19:52,782 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:52,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1839805964, now seen corresponding path program 12 times [2022-11-20 12:19:52,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:52,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943376942] [2022-11-20 12:19:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:52,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 12:19:53,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:53,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943376942] [2022-11-20 12:19:53,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943376942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:19:53,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763578483] [2022-11-20 12:19:53,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:19:53,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:53,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:19:53,198 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:19:53,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 12:19:53,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-20 12:19:53,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:19:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 12:19:53,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:19:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 12:19:53,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:19:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 12:19:54,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763578483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:19:54,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:19:54,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 26 [2022-11-20 12:19:54,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670559762] [2022-11-20 12:19:54,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:19:54,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 12:19:54,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:54,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 12:19:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:19:54,180 INFO L87 Difference]: Start difference. First operand 1512 states and 1828 transitions. Second operand has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:59,886 INFO L93 Difference]: Finished difference Result 3916 states and 4927 transitions. [2022-11-20 12:19:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 12:19:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 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 88 [2022-11-20 12:19:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:59,890 INFO L225 Difference]: With dead ends: 3916 [2022-11-20 12:19:59,890 INFO L226 Difference]: Without dead ends: 3912 [2022-11-20 12:19:59,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=386, Invalid=4170, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 12:19:59,891 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 709 mSDsluCounter, 2422 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2602 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:59,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 2602 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 12:19:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2022-11-20 12:20:01,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 2017. [2022-11-20 12:20:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 1.2142857142857142) internal successors, (2448), 2016 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:20:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 2448 transitions. [2022-11-20 12:20:01,607 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 2448 transitions. Word has length 88 [2022-11-20 12:20:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:20:01,607 INFO L495 AbstractCegarLoop]: Abstraction has 2017 states and 2448 transitions. [2022-11-20 12:20:01,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:20:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 2448 transitions. [2022-11-20 12:20:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 12:20:01,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:20:01,609 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:20:01,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 12:20:01,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:20:01,815 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:20:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:20:01,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1581640526, now seen corresponding path program 13 times [2022-11-20 12:20:01,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:20:01,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157022610] [2022-11-20 12:20:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:20:01,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:20:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:20:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 12:20:04,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:20:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157022610] [2022-11-20 12:20:04,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157022610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:20:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493859272] [2022-11-20 12:20:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:20:04,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:20:04,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:20:04,978 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:20:04,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 12:20:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:20:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 12:20:05,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:20:06,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:20:06,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:20:06,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:20:06,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:20:06,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:20:06,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 33 [2022-11-20 12:20:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 139 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 12:20:06,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:20:07,310 INFO L321 Elim1Store]: treesize reduction 4, result has 96.7 percent of original size [2022-11-20 12:20:07,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-11-20 12:20:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 12:20:08,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493859272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:20:08,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:20:08,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 14] total 48 [2022-11-20 12:20:08,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795050073] [2022-11-20 12:20:08,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:20:08,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 12:20:08,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:20:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 12:20:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 12:20:08,093 INFO L87 Difference]: Start difference. First operand 2017 states and 2448 transitions. Second operand has 48 states, 48 states have (on average 3.5) internal successors, (168), 48 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:20:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:20:24,635 INFO L93 Difference]: Finished difference Result 9030 states and 11529 transitions. [2022-11-20 12:20:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-20 12:20:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5) internal successors, (168), 48 states have internal predecessors, (168), 0 states have call successors, (0), 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 88 [2022-11-20 12:20:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:20:24,643 INFO L225 Difference]: With dead ends: 9030 [2022-11-20 12:20:24,643 INFO L226 Difference]: Without dead ends: 8465 [2022-11-20 12:20:24,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 148 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3562 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1456, Invalid=9674, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 12:20:24,645 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1351 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:20:24,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 1314 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 12:20:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8465 states. [2022-11-20 12:20:27,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8465 to 2759. [2022-11-20 12:20:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2759 states, 2758 states have (on average 1.1812907904278462) internal successors, (3258), 2758 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:20:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2759 states to 2759 states and 3258 transitions. [2022-11-20 12:20:27,138 INFO L78 Accepts]: Start accepts. Automaton has 2759 states and 3258 transitions. Word has length 88 [2022-11-20 12:20:27,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:20:27,138 INFO L495 AbstractCegarLoop]: Abstraction has 2759 states and 3258 transitions. [2022-11-20 12:20:27,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5) internal successors, (168), 48 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:20:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2759 states and 3258 transitions. [2022-11-20 12:20:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 12:20:27,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:20:27,140 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:20:27,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 12:20:27,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:20:27,341 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:20:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:20:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash 240292206, now seen corresponding path program 14 times [2022-11-20 12:20:27,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:20:27,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690415258] [2022-11-20 12:20:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:20:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:20:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:20:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:20:30,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:20:30,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690415258] [2022-11-20 12:20:30,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690415258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:20:30,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535438271] [2022-11-20 12:20:30,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:20:30,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:20:30,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:20:30,940 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:20:30,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 12:20:31,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:20:31,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:20:31,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-20 12:20:31,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:20:32,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:20:32,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:20:32,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:20:32,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:20:32,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:20:32,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 33 [2022-11-20 12:20:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 12:20:32,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:20:34,026 INFO L321 Elim1Store]: treesize reduction 25, result has 73.1 percent of original size [2022-11-20 12:20:34,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 75 [2022-11-20 12:20:34,176 INFO L321 Elim1Store]: treesize reduction 26, result has 69.0 percent of original size [2022-11-20 12:20:34,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 65 [2022-11-20 12:20:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 25 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 12:20:34,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535438271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:20:34,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:20:34,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 18] total 56 [2022-11-20 12:20:34,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118366413] [2022-11-20 12:20:34,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:20:34,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 12:20:34,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:20:34,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 12:20:34,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2742, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 12:20:34,700 INFO L87 Difference]: Start difference. First operand 2759 states and 3258 transitions. Second operand has 56 states, 56 states have (on average 3.1607142857142856) internal successors, (177), 56 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:21:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:21:06,608 INFO L93 Difference]: Finished difference Result 14021 states and 17184 transitions. [2022-11-20 12:21:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-20 12:21:06,609 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.1607142857142856) internal successors, (177), 56 states have internal predecessors, (177), 0 states have call successors, (0), 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 88 [2022-11-20 12:21:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:21:06,618 INFO L225 Difference]: With dead ends: 14021 [2022-11-20 12:21:06,618 INFO L226 Difference]: Without dead ends: 11177 [2022-11-20 12:21:06,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 143 SyntacticMatches, 12 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8842 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=3013, Invalid=22109, Unknown=0, NotChecked=0, Total=25122 [2022-11-20 12:21:06,623 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 1507 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 2772 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 3474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 2772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:21:06,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1507 Valid, 1780 Invalid, 3474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 2772 Invalid, 0 Unknown, 441 Unchecked, 2.8s Time] [2022-11-20 12:21:06,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11177 states. [2022-11-20 12:21:10,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11177 to 4513. [2022-11-20 12:21:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4512 states have (on average 1.1496010638297873) internal successors, (5187), 4512 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:21:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 5187 transitions. [2022-11-20 12:21:10,831 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 5187 transitions. Word has length 88 [2022-11-20 12:21:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:21:10,832 INFO L495 AbstractCegarLoop]: Abstraction has 4513 states and 5187 transitions. [2022-11-20 12:21:10,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.1607142857142856) internal successors, (177), 56 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:21:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 5187 transitions. [2022-11-20 12:21:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 12:21:10,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:21:10,839 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:21:10,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 12:21:11,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 12:21:11,045 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:21:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:21:11,045 INFO L85 PathProgramCache]: Analyzing trace with hash 405773490, now seen corresponding path program 15 times [2022-11-20 12:21:11,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:21:11,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490573476] [2022-11-20 12:21:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:21:11,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:21:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:21:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 12:21:13,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:21:13,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490573476] [2022-11-20 12:21:13,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490573476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:21:13,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19637561] [2022-11-20 12:21:13,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:21:13,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:21:13,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:21:13,952 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:21:13,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 12:21:14,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 12:21:14,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:21:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-20 12:21:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:21:14,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 12:21:14,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-20 12:21:14,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-20 12:21:14,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:14,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-20 12:21:14,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:14,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-20 12:21:14,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:14,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-20 12:21:21,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:21:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:21:21,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:21:21,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:21:21,481 INFO L321 Elim1Store]: treesize reduction 81, result has 27.7 percent of original size [2022-11-20 12:21:21,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 25 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 142 treesize of output 84 [2022-11-20 12:21:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 127 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 12:21:21,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:21:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 32 proven. 105 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-20 12:21:32,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19637561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:21:32,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:21:32,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 41, 35] total 94 [2022-11-20 12:21:32,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657804146] [2022-11-20 12:21:32,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:21:32,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-20 12:21:32,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:21:32,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-20 12:21:32,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=7516, Unknown=0, NotChecked=0, Total=8742 [2022-11-20 12:21:32,338 INFO L87 Difference]: Start difference. First operand 4513 states and 5187 transitions. Second operand has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:23:14,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:23:14,506 INFO L93 Difference]: Finished difference Result 11213 states and 12742 transitions. [2022-11-20 12:23:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2022-11-20 12:23:14,506 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 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 88 [2022-11-20 12:23:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:23:14,512 INFO L225 Difference]: With dead ends: 11213 [2022-11-20 12:23:14,513 INFO L226 Difference]: Without dead ends: 6711 [2022-11-20 12:23:14,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 135 SyntacticMatches, 39 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44059 ImplicationChecksByTransitivity, 97.5s TimeCoverageRelationStatistics Valid=12963, Invalid=94949, Unknown=0, NotChecked=0, Total=107912 [2022-11-20 12:23:14,520 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1826 mSDsluCounter, 3341 mSDsCounter, 0 mSdLazyCounter, 5316 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1826 SdHoareTripleChecker+Valid, 3443 SdHoareTripleChecker+Invalid, 8108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 5316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2609 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:23:14,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1826 Valid, 3443 Invalid, 8108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 5316 Invalid, 0 Unknown, 2609 Unchecked, 6.4s Time] [2022-11-20 12:23:14,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6711 states. [2022-11-20 12:23:18,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6711 to 3682. [2022-11-20 12:23:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.121434392828036) internal successors, (4128), 3681 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:23:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4128 transitions. [2022-11-20 12:23:18,755 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4128 transitions. Word has length 88 [2022-11-20 12:23:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:23:18,756 INFO L495 AbstractCegarLoop]: Abstraction has 3682 states and 4128 transitions. [2022-11-20 12:23:18,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:23:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4128 transitions. [2022-11-20 12:23:18,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 12:23:18,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:23:18,763 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:23:18,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-20 12:23:19,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-20 12:23:19,005 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:23:19,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:23:19,005 INFO L85 PathProgramCache]: Analyzing trace with hash -16119442, now seen corresponding path program 16 times [2022-11-20 12:23:19,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:23:19,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428372849] [2022-11-20 12:23:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:23:19,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:23:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:23:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:23:23,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:23:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428372849] [2022-11-20 12:23:23,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428372849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:23:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113603902] [2022-11-20 12:23:23,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:23:23,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:23:23,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:23:23,427 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:23:23,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 12:23:23,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:23:23,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:23:23,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-20 12:23:23,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:23:25,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:23:25,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:23:25,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:23:25,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:23:25,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:23:25,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 34 [2022-11-20 12:23:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 135 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 12:23:25,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:23:26,962 INFO L321 Elim1Store]: treesize reduction 13, result has 89.5 percent of original size [2022-11-20 12:23:26,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 140 [2022-11-20 12:23:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 25 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 12:23:27,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113603902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:23:27,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:23:27,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 17] total 53 [2022-11-20 12:23:27,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136418058] [2022-11-20 12:23:27,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:23:27,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 12:23:27,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:23:27,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 12:23:27,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2463, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 12:23:27,729 INFO L87 Difference]: Start difference. First operand 3682 states and 4128 transitions. Second operand has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:23:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:23:44,367 INFO L93 Difference]: Finished difference Result 5200 states and 5759 transitions. [2022-11-20 12:23:44,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-20 12:23:44,368 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 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 88 [2022-11-20 12:23:44,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:23:44,370 INFO L225 Difference]: With dead ends: 5200 [2022-11-20 12:23:44,370 INFO L226 Difference]: Without dead ends: 2830 [2022-11-20 12:23:44,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3283 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1242, Invalid=10100, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 12:23:44,373 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1275 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:23:44,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 933 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 12:23:44,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2022-11-20 12:23:47,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2389. [2022-11-20 12:23:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 1.0649078726968175) internal successors, (2543), 2388 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:23:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 2543 transitions. [2022-11-20 12:23:47,605 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 2543 transitions. Word has length 88 [2022-11-20 12:23:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:23:47,605 INFO L495 AbstractCegarLoop]: Abstraction has 2389 states and 2543 transitions. [2022-11-20 12:23:47,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:23:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 2543 transitions. [2022-11-20 12:23:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-20 12:23:47,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:23:47,609 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:23:47,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 12:23:47,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:23:47,816 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:23:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:23:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2145546816, now seen corresponding path program 17 times [2022-11-20 12:23:47,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:23:47,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084131983] [2022-11-20 12:23:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:23:47,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:23:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:23:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 62 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 12:23:49,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:23:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084131983] [2022-11-20 12:23:49,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084131983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:23:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680428177] [2022-11-20 12:23:49,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:23:49,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:23:49,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:23:49,549 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:23:49,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 12:23:56,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-20 12:23:56,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:23:56,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 12:23:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:23:56,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2022-11-20 12:23:56,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 12:23:57,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:23:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 62 proven. 101 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-20 12:23:57,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:23:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 62 proven. 78 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-20 12:23:58,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680428177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:23:58,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:23:58,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 13] total 42 [2022-11-20 12:23:58,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350274173] [2022-11-20 12:23:58,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:23:58,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 12:23:58,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:23:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 12:23:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 12:23:58,473 INFO L87 Difference]: Start difference. First operand 2389 states and 2543 transitions. Second operand has 42 states, 42 states have (on average 4.166666666666667) internal successors, (175), 42 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:24:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:24:03,906 INFO L93 Difference]: Finished difference Result 2597 states and 2778 transitions. [2022-11-20 12:24:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:24:03,907 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.166666666666667) internal successors, (175), 42 states have internal predecessors, (175), 0 states have call successors, (0), 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 98 [2022-11-20 12:24:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:24:03,909 INFO L225 Difference]: With dead ends: 2597 [2022-11-20 12:24:03,909 INFO L226 Difference]: Without dead ends: 1928 [2022-11-20 12:24:03,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=420, Invalid=2442, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 12:24:03,911 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 427 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:24:03,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 965 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:24:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2022-11-20 12:24:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1802. [2022-11-20 12:24:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 1.0699611327040532) internal successors, (1927), 1801 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:24:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1927 transitions. [2022-11-20 12:24:06,444 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1927 transitions. Word has length 98 [2022-11-20 12:24:06,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:24:06,445 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 1927 transitions. [2022-11-20 12:24:06,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.166666666666667) internal successors, (175), 42 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:24:06,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1927 transitions. [2022-11-20 12:24:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 12:24:06,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:24:06,447 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:24:06,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 12:24:06,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 12:24:06,648 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:24:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:24:06,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1561485459, now seen corresponding path program 18 times [2022-11-20 12:24:06,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:24:06,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354367897] [2022-11-20 12:24:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:24:06,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:24:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:24:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-20 12:24:08,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:24:08,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354367897] [2022-11-20 12:24:08,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354367897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:24:08,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464105414] [2022-11-20 12:24:08,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:24:08,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:24:08,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:24:08,310 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:24:08,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 12:24:09,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-20 12:24:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:24:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-20 12:24:09,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:24:09,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 12:24:09,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:24:09,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:24:09,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:24:09,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:24:09,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:24:15,677 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 12:24:15,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 20 [2022-11-20 12:24:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 12:24:15,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:24:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 22 proven. 185 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 12:24:27,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464105414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:24:27,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:24:27,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 43, 32] total 84 [2022-11-20 12:24:27,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018414439] [2022-11-20 12:24:27,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:24:27,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-20 12:24:27,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:24:27,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-20 12:24:27,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=5794, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 12:24:27,102 INFO L87 Difference]: Start difference. First operand 1802 states and 1927 transitions. Second operand has 84 states, 84 states have (on average 2.630952380952381) internal successors, (221), 84 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:24:33,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:24:33,790 INFO L93 Difference]: Finished difference Result 2355 states and 2508 transitions. [2022-11-20 12:24:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-20 12:24:33,791 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.630952380952381) internal successors, (221), 84 states have internal predecessors, (221), 0 states have call successors, (0), 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 99 [2022-11-20 12:24:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:24:33,793 INFO L225 Difference]: With dead ends: 2355 [2022-11-20 12:24:33,793 INFO L226 Difference]: Without dead ends: 2351 [2022-11-20 12:24:33,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4779 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=2021, Invalid=10861, Unknown=0, NotChecked=0, Total=12882 [2022-11-20 12:24:33,795 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 774 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 836 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:24:33,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 873 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1189 Invalid, 0 Unknown, 836 Unchecked, 0.9s Time] [2022-11-20 12:24:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2022-11-20 12:24:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1841. [2022-11-20 12:24:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.0679347826086956) internal successors, (1965), 1840 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:24:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 1965 transitions. [2022-11-20 12:24:35,973 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 1965 transitions. Word has length 99 [2022-11-20 12:24:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:24:35,973 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 1965 transitions. [2022-11-20 12:24:35,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.630952380952381) internal successors, (221), 84 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:24:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 1965 transitions. [2022-11-20 12:24:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 12:24:35,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:24:35,977 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:24:35,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 12:24:36,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:24:36,184 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:24:36,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:24:36,184 INFO L85 PathProgramCache]: Analyzing trace with hash 250681277, now seen corresponding path program 19 times [2022-11-20 12:24:36,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:24:36,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962619515] [2022-11-20 12:24:36,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:24:36,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:24:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:24:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-20 12:24:36,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:24:36,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962619515] [2022-11-20 12:24:36,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962619515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:24:36,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531739786] [2022-11-20 12:24:36,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:24:36,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:24:36,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:24:36,947 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:24:36,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 12:24:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:24:37,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 12:24:37,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:24:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:24:37,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:24:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-20 12:24:38,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531739786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:24:38,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:24:38,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2022-11-20 12:24:38,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16210861] [2022-11-20 12:24:38,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:24:38,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 12:24:38,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:24:38,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 12:24:38,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:24:38,075 INFO L87 Difference]: Start difference. First operand 1841 states and 1965 transitions. Second operand has 32 states, 32 states have (on average 5.96875) internal successors, (191), 32 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:24:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:24:48,958 INFO L93 Difference]: Finished difference Result 3005 states and 3247 transitions. [2022-11-20 12:24:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-20 12:24:48,958 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.96875) internal successors, (191), 32 states have internal predecessors, (191), 0 states have call successors, (0), 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 109 [2022-11-20 12:24:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:24:48,961 INFO L225 Difference]: With dead ends: 3005 [2022-11-20 12:24:48,962 INFO L226 Difference]: Without dead ends: 3001 [2022-11-20 12:24:48,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=616, Invalid=9686, Unknown=0, NotChecked=0, Total=10302 [2022-11-20 12:24:48,963 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 772 mSDsluCounter, 5017 mSDsCounter, 0 mSdLazyCounter, 4741 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 5303 SdHoareTripleChecker+Invalid, 4776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:24:48,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 5303 Invalid, 4776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4741 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 12:24:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2022-11-20 12:24:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1906. [2022-11-20 12:24:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 1.0650918635170603) internal successors, (2029), 1905 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:24:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2029 transitions. [2022-11-20 12:24:51,672 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2029 transitions. Word has length 109 [2022-11-20 12:24:51,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:24:51,673 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 2029 transitions. [2022-11-20 12:24:51,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.96875) internal successors, (191), 32 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:24:51,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2029 transitions. [2022-11-20 12:24:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 12:24:51,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:24:51,675 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:24:51,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 12:24:51,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 12:24:51,876 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:24:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:24:51,877 INFO L85 PathProgramCache]: Analyzing trace with hash 508846715, now seen corresponding path program 20 times [2022-11-20 12:24:51,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:24:51,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308900973] [2022-11-20 12:24:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:24:51,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:24:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:24:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 223 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 12:24:56,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:24:56,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308900973] [2022-11-20 12:24:56,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308900973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:24:56,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738612960] [2022-11-20 12:24:56,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:24:56,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:24:56,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:24:56,458 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:24:56,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 12:24:56,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:24:56,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:24:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-20 12:24:56,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:24:58,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:24:58,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:24:58,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:24:58,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:24:58,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:24:58,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:24:58,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 33 [2022-11-20 12:24:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 245 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 12:24:58,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:24:59,331 INFO L321 Elim1Store]: treesize reduction 4, result has 96.7 percent of original size [2022-11-20 12:24:59,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-11-20 12:25:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 53 proven. 201 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-20 12:25:00,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738612960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:25:00,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:25:00,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 16] total 47 [2022-11-20 12:25:00,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454782785] [2022-11-20 12:25:00,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:25:00,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 12:25:00,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:25:00,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 12:25:00,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 12:25:00,070 INFO L87 Difference]: Start difference. First operand 1906 states and 2029 transitions. Second operand has 47 states, 47 states have (on average 4.382978723404255) internal successors, (206), 47 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:08,925 INFO L93 Difference]: Finished difference Result 2878 states and 3087 transitions. [2022-11-20 12:25:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 12:25:08,925 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.382978723404255) internal successors, (206), 47 states have internal predecessors, (206), 0 states have call successors, (0), 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 109 [2022-11-20 12:25:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:08,928 INFO L225 Difference]: With dead ends: 2878 [2022-11-20 12:25:08,928 INFO L226 Difference]: Without dead ends: 2798 [2022-11-20 12:25:08,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 193 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=629, Invalid=4627, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 12:25:08,929 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 606 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:08,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 1022 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 12:25:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2022-11-20 12:25:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2394. [2022-11-20 12:25:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 1.0513999164229002) internal successors, (2516), 2393 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 2516 transitions. [2022-11-20 12:25:12,476 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 2516 transitions. Word has length 109 [2022-11-20 12:25:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:12,477 INFO L495 AbstractCegarLoop]: Abstraction has 2394 states and 2516 transitions. [2022-11-20 12:25:12,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.382978723404255) internal successors, (206), 47 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 2516 transitions. [2022-11-20 12:25:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 12:25:12,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:12,480 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:12,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-20 12:25:12,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 12:25:12,681 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:25:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash -881515465, now seen corresponding path program 21 times [2022-11-20 12:25:12,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:25:12,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87382649] [2022-11-20 12:25:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:12,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:25:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 29 proven. 247 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:25:17,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:25:17,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87382649] [2022-11-20 12:25:17,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87382649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:25:17,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198009695] [2022-11-20 12:25:17,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:25:17,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:25:17,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:25:17,411 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:25:17,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 12:25:18,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-20 12:25:18,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:25:18,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-20 12:25:18,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:18,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 12:25:18,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:25:18,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:25:18,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:25:18,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:25:18,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 12:25:27,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:25:27,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:25:27,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:25:27,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 33 [2022-11-20 12:25:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 103 proven. 161 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-20 12:25:27,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:25:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 37 proven. 202 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-20 12:25:55,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198009695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:25:55,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:25:55,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 34, 27] total 83 [2022-11-20 12:25:55,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475067837] [2022-11-20 12:25:55,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:25:55,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-20 12:25:55,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:25:55,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-20 12:25:55,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=790, Invalid=6016, Unknown=0, NotChecked=0, Total=6806 [2022-11-20 12:25:55,576 INFO L87 Difference]: Start difference. First operand 2394 states and 2516 transitions. Second operand has 83 states, 83 states have (on average 2.9036144578313254) internal successors, (241), 83 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:35,489 WARN L233 SmtUtils]: Spent 5.98s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:26:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:40,165 INFO L93 Difference]: Finished difference Result 2595 states and 2740 transitions. [2022-11-20 12:26:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-20 12:26:40,166 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.9036144578313254) internal successors, (241), 83 states have internal predecessors, (241), 0 states have call successors, (0), 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 109 [2022-11-20 12:26:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:40,167 INFO L225 Difference]: With dead ends: 2595 [2022-11-20 12:26:40,168 INFO L226 Difference]: Without dead ends: 2333 [2022-11-20 12:26:40,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 184 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6613 ImplicationChecksByTransitivity, 60.2s TimeCoverageRelationStatistics Valid=2554, Invalid=18906, Unknown=2, NotChecked=0, Total=21462 [2022-11-20 12:26:40,170 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 560 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1400 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:40,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1170 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1632 Invalid, 0 Unknown, 1400 Unchecked, 2.0s Time] [2022-11-20 12:26:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-11-20 12:26:43,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2176. [2022-11-20 12:26:43,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 1.0510344827586207) internal successors, (2286), 2175 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 2286 transitions. [2022-11-20 12:26:43,763 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 2286 transitions. Word has length 109 [2022-11-20 12:26:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:43,763 INFO L495 AbstractCegarLoop]: Abstraction has 2176 states and 2286 transitions. [2022-11-20 12:26:43,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.9036144578313254) internal successors, (241), 83 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:43,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 2286 transitions. [2022-11-20 12:26:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 12:26:43,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:43,766 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:26:43,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 12:26:43,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 12:26:43,967 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:26:43,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:43,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1126700283, now seen corresponding path program 22 times [2022-11-20 12:26:43,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:26:43,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160694693] [2022-11-20 12:26:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:26:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 223 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 12:26:48,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:26:48,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160694693] [2022-11-20 12:26:48,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160694693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:26:48,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002478126] [2022-11-20 12:26:48,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:26:48,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:26:48,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:26:48,496 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:26:48,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 12:26:48,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:26:48,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:26:48,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 12:26:48,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:26:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:26:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:26:50,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:26:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:26:50,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:26:50,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:26:50,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 34 [2022-11-20 12:26:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 222 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 12:26:50,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:26:51,652 INFO L321 Elim1Store]: treesize reduction 13, result has 89.3 percent of original size [2022-11-20 12:26:51,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 138 [2022-11-20 12:26:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 53 proven. 201 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-20 12:26:52,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002478126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:26:52,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:26:52,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 16] total 47 [2022-11-20 12:26:52,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000987506] [2022-11-20 12:26:52,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:26:52,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 12:26:52,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:26:52,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 12:26:52,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 12:26:52,430 INFO L87 Difference]: Start difference. First operand 2176 states and 2286 transitions. Second operand has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:03,102 INFO L93 Difference]: Finished difference Result 2552 states and 2706 transitions. [2022-11-20 12:27:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 12:27:03,103 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 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 109 [2022-11-20 12:27:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:03,105 INFO L225 Difference]: With dead ends: 2552 [2022-11-20 12:27:03,105 INFO L226 Difference]: Without dead ends: 2512 [2022-11-20 12:27:03,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=615, Invalid=4497, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 12:27:03,106 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 581 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:03,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 1180 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 12:27:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2022-11-20 12:27:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2272. [2022-11-20 12:27:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 1.0475561426684281) internal successors, (2379), 2271 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2379 transitions. [2022-11-20 12:27:07,069 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2379 transitions. Word has length 109 [2022-11-20 12:27:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:07,069 INFO L495 AbstractCegarLoop]: Abstraction has 2272 states and 2379 transitions. [2022-11-20 12:27:07,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2379 transitions. [2022-11-20 12:27:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 12:27:07,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:07,074 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:07,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 12:27:07,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 12:27:07,282 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:27:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:07,282 INFO L85 PathProgramCache]: Analyzing trace with hash 704807351, now seen corresponding path program 23 times [2022-11-20 12:27:07,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:07,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598466930] [2022-11-20 12:27:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:07,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 29 proven. 247 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:27:12,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:12,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598466930] [2022-11-20 12:27:12,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598466930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:12,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144203712] [2022-11-20 12:27:12,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:27:12,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:12,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:12,363 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:12,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567e4974-5ccb-40be-818a-1dcf5c9912d3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 12:27:38,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-20 12:27:38,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:27:38,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 167 conjunts are in the unsatisfiable core [2022-11-20 12:27:38,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:39,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:27:39,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:27:39,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:27:39,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:27:55,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:27:55,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:27:55,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:27:55,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:27:55,077 INFO L321 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2022-11-20 12:27:55,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 76 treesize of output 35 [2022-11-20 12:27:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 32 proven. 294 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:27:55,214 INFO L328 TraceCheckSpWp]: Computing backward predicates...